Display device

Abstract

The display device includes a plurality of sub-pixels arranged along a first direction and a second direction intersecting the first direction, wherein each of the plurality of sub-pixels includes an emission region, a plurality of electrodes located in the emission region extending in the first direction and spaced apart from each other in the second direction, and a plurality of light-emitting elements located on the electrodes spaced apart from each other in the second direction, and wherein the plurality of sub-pixels includes a plurality of first-type sub-pixels and a plurality of second-type sub-pixels, the second-type sub-pixels having a different number of electrodes in the emission region than the first-type sub-pixels.

Description

Technical Field

[0001] This disclosure relates to display devices. Background Technology

[0002] With the development of multimedia technology, display devices have become increasingly important. Therefore, various display devices have been developed, such as liquid crystal displays (LCDs) and organic light-emitting diode (OLED) displays.

[0003] Typical display devices include display panels for displaying images, such as OLED display panels or LCD panels. Light-emitting display panels are a type of display panel that may include light-emitting elements, such as, for example, light-emitting diodes (LEDs). LEDs can be classified into OLEDs, which use organic materials as light-emitting materials, and inorganic LEDs (ILEDs), which use inorganic materials as light-emitting materials. Summary of the Invention

[0004] Embodiments of this disclosure provide a display device in which pixels with different electrode configurations are arranged.

[0005] Embodiments of this disclosure also provide a display device that has uniform brightness regardless of the position of pixels with different configurations.

[0006] However, the embodiments of this disclosure are not limited to those described herein. The above and other embodiments of this disclosure will become more apparent to those skilled in the art upon reference to the following detailed description of this disclosure.

[0007] According to embodiments of the present disclosure, a display device includes a plurality of sub-pixels arranged along a first direction and a second direction intersecting the first direction, wherein each of the plurality of sub-pixels includes an emission region, a plurality of electrodes located in the emission region extending in the first direction and spaced apart from each other in the second direction, and a plurality of light-emitting elements located on the plurality of electrodes spaced apart from each other in the second direction, and wherein the plurality of sub-pixels includes a plurality of first-type sub-pixels and a plurality of second-type sub-pixels, the second-type sub-pixels having a different number of electrodes in the emission region than the first-type sub-pixels.

[0008] Within each unit area of ​​the emission region, the first type of subpixel may include more light-emitting elements than the second type of subpixel, and within the emission region, the first type of subpixel may include fewer electrodes than the second type of subpixel.

[0009] The display device may further include a plurality of first regions in which first type sub-pixels are arranged along a first direction and a second direction, and a plurality of second regions adjacent to the first regions, wherein second type sub-pixels are arranged along the first direction and the second direction in the second regions, wherein the first regions and the second regions have the same length in the first direction.

[0010] Multiple first regions and multiple second regions may be arranged alternately along a second direction, and the distance between the multiple second regions in the second direction may be uniform.

[0011] At least some of the second regions may have a smaller width in the second direction than the other second regions.

[0012] Each of the plurality of sub-pixels may further include a sub-region separated from the emission region in a first direction, and the electrodes of each of the plurality of sub-pixels arranged along the first direction may be separately located in the sub-region of the corresponding sub-pixel in the sub-pixel.

[0013] The display device may further include a plurality of first pixels and a plurality of second pixels, each of the plurality of first pixels including two or more of a plurality of first type sub-pixels, each of the plurality of second pixels including two or more of a plurality of second type sub-pixels, wherein the first pixels may be arranged along a first direction, and the second pixels may be arranged along the first direction.

[0014] Each of the plurality of sub-pixels may include a first electrode, a second electrode spaced apart from the first electrode in a second direction, and a first light-emitting element located on the first electrode and the second electrode. Each of the plurality of second-type sub-pixels may also include a third electrode spaced apart from the first electrode in a first direction, a fourth electrode spaced apart from the second electrode in a first direction, and a second light-emitting element located on the third electrode and the fourth electrode.

[0015] Each of the plurality of first type sub-pixels may further include a first contact electrode on a first electrode and a second contact electrode on a second electrode, the first contact electrode being in contact with a first end portion of the first light-emitting element and the second contact electrode being in contact with a second end portion of the first light-emitting element.

[0016] Each of the plurality of second-type sub-pixels may further include a first contact electrode on a first electrode, a second contact electrode on a fourth electrode, and a third contact electrode on a third electrode, wherein the first contact electrode may contact a first end portion of the first light-emitting element, the third contact electrode may contact a second end portion of the first light-emitting element and a first end portion of the second light-emitting element, and the second contact electrode may contact a second end portion of the second light-emitting element.

[0017] Each of the plurality of sub-pixels may include a first electrode, a second electrode spaced apart from the first electrode in a second direction, a third electrode spaced apart from the first electrode in a first direction, and a fourth electrode spaced apart from the second electrode in a first direction. Each of the plurality of second-type sub-pixels may also include a fifth electrode between the first electrode and the second electrode, a sixth electrode spaced apart from the second electrode in a second direction, a seventh electrode spaced apart from the fifth electrode in a first direction, and an eighth electrode spaced apart from the sixth electrode in a first direction.

[0018] Each of the plurality of first-type sub-pixels may further include a first light-emitting element located on a first electrode and a second electrode, a second light-emitting element located on a third electrode and a fourth electrode, and a first contact electrode and a second contact electrode located on the first electrode and the second electrode, respectively.

[0019] Each of the plurality of second-type sub-pixels may further include a first light-emitting element located on a first electrode and a fifth electrode, a second light-emitting element located on a second electrode and a sixth electrode, a third light-emitting element located on a third electrode and a seventh electrode, a fourth light-emitting element located on a fourth electrode and an eighth electrode, a first contact electrode on a first electrode and a second contact electrode on a second electrode, a third contact electrode on a third electrode and a fifth contact electrode on a third electrode and a fifth contact electrode on a seventh electrode and an eighth electrode.

[0020] The plurality of sub-pixels may also include a plurality of third-type sub-pixels, and each of the plurality of third-type sub-pixels may include a ninth electrode between the first electrode and the third electrode and a tenth electrode spaced apart from the ninth electrode in a second direction and located between the second electrode and the fourth electrode.

[0021] According to an embodiment of the present disclosure, a display device includes: a display area, wherein a plurality of pixels, including a plurality of sub-pixels, are located in the display area; and a non-display area surrounding the display area, wherein each of the plurality of sub-pixels includes a first electrode group, a second electrode group, and a plurality of light-emitting elements, the first electrode group including a plurality of electrodes extending in a first direction and spaced apart from each other in a second direction intersecting the first direction, the second electrode group being spaced apart from the first electrode group in the first direction and including a plurality of electrodes spaced apart from each other in the second direction, the plurality of light-emitting elements being located on the electrodes and spaced apart from each other in the first direction, wherein the plurality of pixels includes a plurality of first pixels and a plurality of second pixels, the number of electrodes in each of the plurality of sub-pixels of the plurality of second pixels is different from the number of electrodes in each of the plurality of sub-pixels of the plurality of first pixels, and wherein the display area includes a plurality of first regions in which the first pixels are located and a plurality of second regions in which the second pixels are located.

[0022] Each of the multiple sub-pixels may also include an emission region, with light-emitting elements and electrodes located in the emission region. Within each unit area of ​​the emission region, the first pixel may have more light-emitting elements than the second pixel, and within the emission region, the first pixel may have fewer electrodes than the second pixel.

[0023] The first region and the second region may extend in the first direction and may be arranged alternately in the second direction, and the first region and the second region may have the same length in the first direction.

[0024] The first region may be located between the second regions that are separated from each other in the second direction, and the distance between the second regions in the second direction may be uniform.

[0025] The width of the first second region in the outermost part of the second region of the display area in the second direction may be smaller than the width of the second second region in the middle part of the second region of the display area in the second direction.

[0026] The display area may also include a third region between the first region and the second region, and in each of the plurality of sub-pixels, a third pixel having a different number of electrodes than the first pixel and the second pixel is located in the third region.

[0027] According to the above and other embodiments of this disclosure, a display device is provided comprising a group of sub-pixels of different types having different electrode configurations and different numbers of series connections between light-emitting elements. The display device may have a sub-pixel arrangement corresponding to the distribution of the printing process, and even if the sub-pixels have different numbers of light-emitting elements per unit area of ​​the emitting region, it can prevent some areas from having low brightness.

[0028] In some implementations, even if the subpixels have different numbers of light-emitting elements disposed per unit area of ​​the emission region and different numbers of series connections between the light-emitting elements, the display device can also correct the drive signal for groups of different types of subpixels, and thereby have uniform brightness at any location in its display area.

[0029] Other features and embodiments will be apparent from the accompanying drawings, claims, and the following detailed description. Attached Figure Description

[0030] The above and other embodiments and features of this disclosure will become more apparent from the detailed description of the embodiments of this disclosure with reference to the accompanying drawings, in which:

[0031] Figure 1 This is a plan view of a display device according to an embodiment of the present disclosure;

[0032] Figure 2 It is shown Figure 1 A layout diagram of the arrangement of multiple pixels in a display device;

[0033] Figure 3 yes Figure 1 A plan view of the first pixel of the display device;

[0034] Figure 4 yes Figure 1 A plan view of the second pixel of the display device;

[0035] Figure 5 yes Figure 3 The planar graph of the first type of sub-pixels;

[0036] Figure 6 It is along Figure 5 A cross-sectional view taken by lines Q1-Q1', Q2-Q2', and Q3-Q3';

[0037] Figure 7 It is along Figure 5 A sectional view taken by line Q4-Q4';

[0038] Figure 8 yes Figure 4 The planar graph of the second type of sub-pixels;

[0039] Figure 9 It is along Figure 8 A sectional view taken by line Q5-Q5';

[0040] Figure 10 and Figure 11 It shows the manufacturing process. Figure 1 A layout diagram of the inkjet printing process performed during the display device;

[0041] Figure 12 It is shown Figure 1 A diagram showing the brightness of the first and second regions of the display device;

[0042] Figure 13 This is a perspective cross-sectional view of a light-emitting element according to an embodiment of the present disclosure;

[0043] Figure 14 It is shown Figure 2 A layout diagram of the arrangement of sub-pixels at the boundary between the first and second regions of a display device;

[0044] Figure 15 This is a layout diagram showing the arrangement of a plurality of pixels in the display area of ​​a display device according to another embodiment of the present disclosure;

[0045] Figure 16 It is shown Figure 15A layout diagram of the arrangement of sub-pixels at the boundary between the first and second regions of a display device;

[0046] Figure 17 This is a layout diagram showing the arrangement of a plurality of pixels in the display area of ​​a display device according to another embodiment of the present disclosure;

[0047] Figure 18 yes Figure 17 A plan view of the sub-pixels (i.e., third type sub-pixels) of the third pixel of the display device;

[0048] Figure 19 It is a plan view of the sub-pixels (i.e., first type sub-pixels) of the first pixel of a display device according to another embodiment of the present disclosure;

[0049] Figure 20 It is shown Figure 19 A layout diagram of the arrangement of sub-pixels at the boundary between the first and second regions of a display device;

[0050] Figure 21 It is a plan view of the sub-pixels (i.e., second type sub-pixels) of the second pixel of a display device according to another embodiment of the present disclosure;

[0051] Figure 22 It is shown Figure 21 A layout diagram of the arrangement of sub-pixels at the boundary between the first and second regions of a display device;

[0052] Figure 23 This is a plan view of the sub-pixels (specifically, second type sub-pixels) of a display device according to another embodiment of the present disclosure;

[0053] Figure 24 This is a layout diagram illustrating the arrangement of a plurality of pixels in a display area of ​​a display device according to another embodiment of the present disclosure; and

[0054] Figure 25 It is shown Figure 24 A layout diagram of the sub-pixels arranged at the boundary between the first and second regions of a display device. Detailed Implementation

[0055] The present disclosure will be described more fully below with reference to the accompanying drawings, in which preferred embodiments of the disclosure are illustrated. However, the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0056] It should also be understood that when a layer is referred to as being "on" another layer or substrate, the layer may be directly on the other layer or substrate, or an intervening layer may be present. Throughout the specification, the same reference numerals denote the same components.

[0057] It should be understood that when a component or layer is referred to as being "connected to," "linked to," or "adjacent to" another component or layer, it may be directly connected to, directly linked to, or directly adjacent to that other component or layer, or there may be one or more intervening components or layers. Conversely, when a component or layer is referred to as being "directly on," "directly connected to," "directly linked to," or "closely adjacent to" another component or layer, there are no intervening components or layers.

[0058] It should be understood that although the terms "first," "second," etc., may be used herein to describe different elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the teachings of the invention, the first element discussed below may be referred to as the second element. Similarly, the second element may also be referred to as the first element.

[0059] For ease of explanation, spatial relative terms such as “below,” “under,” “lower,” “below,” “above,” and “upper” may be used herein to describe the relationship between one element or feature and another element (or feature) or feature (or feature) as shown in the figures. It should be understood that, in addition to the orientations depicted in the figures, spatial relative terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Thus, the exemplary terms “below” and “below” can include both above and below orientations. The device may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein should be interpreted accordingly. Furthermore, it should be understood that when a layer is referred to as “between two layers,” it may be the only layer between the two layers, or there may be one or more intervening layers.

[0060] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. As used herein, the terms “substantially,” “about,” and similar terms are used as approximate terms rather than as terms of degree and are intended to account for inherent biases in measured or calculated values ​​that will be recognized by one of ordinary skill in the art.

[0061] As used herein, the singular forms “a” and “an” are intended to also include the plural forms unless the context clearly indicates otherwise. It will be further understood that, when used in this specification, the terms “comprises” and / or “comprising” specify the presence of the described features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. When preceding a list of elements, expressions such as “at least one of…” modify the entire list of elements without modifying the individual elements in the list. Furthermore, when describing embodiments of this disclosure, the use of “may” means “one or more embodiments of this disclosure.” Additionally, the term “exemplary” is intended to indicate an example or illustration. As used herein, the terms “use,” “using,” and “used” may be considered synonymous with the terms “utilize,” “utilizing,” and “utilized,” respectively.

[0062] In the following description, embodiments will be illustrated with reference to the accompanying drawings.

[0063] Figure 1 This is a plan view of a display device according to an embodiment of the present disclosure.

[0064] refer to Figure 1 The display device 10 displays moving or still images. The display device 10 can refer to virtually any type of electronic device that provides a display screen. Examples of display devices 10 may include televisions (TVs), laptop computers, monitors, billboards, Internet of Things (IoT) devices, mobile phones, smartphones, tablet PCs, electronic watches, smartwatches, watch phones, head-mounted displays (HMDs), mobile communication terminals, electronic notebooks, e-books, portable multimedia players (PMPs), navigation devices, game consoles, digital cameras, camcorders, etc.

[0065] Display device 10 includes a display panel that provides a display screen. Examples of display panels for display device 10 include inorganic light-emitting diode (ILED) display panels, organic light-emitting diode (OLED) display panels, quantum dot light-emitting diode (QLED) display panels, plasma display panels (PDP), field emission display (FED) panels, etc. In the following description, the display panel of display device 10 will be described as, for example, an ILED display panel, but this disclosure is not limited thereto. That is, various other display panels may also be used in the display panel of display device 10.

[0066] The shape of the display device 10 can vary. For example, the display device 10 may have a rectangular shape that extends longer in the horizontal direction than in the vertical direction, a rectangular shape that extends longer in the vertical direction than in the horizontal direction, a square shape, a quadrilateral shape with rounded corners, a non-quadrilateral polygonal shape, or a circular shape. The shape of the display area DPA of the display device 10 may be similar to the shape of the display device 10. Figure 1 The display device 10 and the display area DPA are shown to both have a rectangular shape extending in a first direction DR1.

[0067] The display device 10 may include a display area DPA and a non-display area NDA (e.g., the non-display area NDA may surround the display area DPA along its edge or periphery). The display area DPA may be the area in which a screen is displayed, and the non-display area NDA may be the area in which a screen is not displayed. The display area DPA may also be referred to as the active area, and the non-display area NDA may also be referred to as the inactive area. The display area DPA may occupy the middle portion (e.g., the central area) of the display device 10.

[0068] The display area DPA may include multiple pixels PX. Pixels PX may be arranged in both row and column directions. Pixels PX may have a rectangular or square shape in a planar view, but this disclosure is not limited thereto. Alternatively, pixels PX may have a rhombus shape (the rhombus shape having sides tilted relative to a particular direction). Pixels PX may be arranged in a striped structure or... The structures are arranged alternately, but this disclosure is not limited thereto. The arrangement structure can be referred to as an RGBG matrix structure (e.g., Matrix structure or RGBG structure (e.g., structure)). It is a registered trademark of Samsung Display Co., Ltd. of South Korea. Each of the pixels (PX) may include one or more light-emitting elements that emit light within a specific wavelength range.

[0069] A non-display area NDA may be disposed around a display area DPA. The non-display area NDA may surround the entire display area DPA or a portion of the display area DPA along its edge or periphery. The display area DPA may have a rectangular shape, and the non-display area NDA may be disposed adjacent to the four sides of the display area DPA. The non-display area NDA may form the bezel of the display device 10. Wiring or circuit drivers included in the display device 10 may be disposed in the non-display area NDA, or external devices may be mounted in the non-display area NDA.

[0070] Figure 2 It is shown Figure 1A layout diagram of the arrangement of multiple pixels in a display device.

[0071] refer to Figure 2 The display device 10 may include a plurality of first pixels PXA and a plurality of second pixels PXB. The display area DPA of the display device 10 may include a first area AA1 in which the first pixels PXA are arranged and a second area AA2 in which the second pixels PXB are arranged.

[0072] When the display device 10 extends longer in the first direction DR1 than in the second direction DR2, the first pixel PXA and the second pixel PXB can be arranged along the first direction DR1. In the display area DPA, multiple pixels PX can be arranged in multiple pixel rows, and the pixels PX arranged along the first direction DR1 in each pixel row can be all the same. For example, in each pixel row, multiple first pixels PXA or multiple second pixels PXB can be arranged, and the types of pixels PX between each pair of adjacent pixel rows can be the same or different. The first pixel PXA can be arranged in multiple pixel rows, the second pixel PXB can also be arranged in multiple pixel rows, and multiple pixel rows can be arranged in each of the first region AA1 and each of the second region AA2. In each of the first region AA1 and each of the second region AA2, multiple pixels PX of the same type can be arranged along the first direction DR1 and the second direction DR2, and groups of pixels PX of different types can be arranged in two adjacent pixel rows on both sides of the boundary between the first region AA1 and the second region AA2.

[0073] As described later, the display device 10 may include groups of subpixels PXn of different types, which differ from each other in the pattern of their electrode configurations and the connections of the light-emitting elements therein, and these groups of subpixels PXn may be arranged in a first region AA1 and a second region AA2. Groups of subpixels PXn of different types may form a first pixel PXA and a second pixel PXB, which may be arranged in separate regions. During the manufacture of the display device 10, inkjet printing may be performed, and the number of light-emitting elements printed in each region or each subpixel PXn may vary depending on the distribution of the printing process. To compensate for differences in brightness caused by the difference in the number of light-emitting elements, the display device 10 may include groups of subpixels PXn with different electrode configurations according to the distribution of the printing process, which will be described in detail later.

[0074] Figure 2It is shown that because groups of different types of sub-pixels PXn form the first pixel PXA and the second pixel PXB, the first region AA1 and the second region AA2 are distinguished from each other according to the arrangement of the first pixel PXA and the second pixel PXB, but this disclosure is not limited thereto. Alternatively, because groups of different types of sub-pixels PXn with different electrode configurations are arranged in the display region DPA, the first region AA1 and the second region AA2 can be distinguished from each other according to the arrangement of the groups of different types of sub-pixels PXn, in which case each of the pixels PX can be formed by different types of sub-pixels PXn. The structure of the pixels PX and the sub-pixels PXn included in each of the pixels PX will be described below.

[0075] Figure 3 yes Figure 1 A plan view of the first pixel of the display device. Figure 4 yes Figure 1 A plan view of the second pixel of the display device.

[0076] refer to Figure 3 and Figure 4 And also refer to Figure 2 Pixel PX may include multiple sub-pixels PXn (where n is an integer from 1 to 6). For example, a first pixel PXA arranged in a first region AA1 may include a first sub-pixel PX1, a second sub-pixel PX2, and a third sub-pixel PX3, and a second pixel PXB arranged in a second region AA2 may include a fourth sub-pixel PX4, a fifth sub-pixel PX5, and a sixth sub-pixel PX6. The first sub-pixel PX1 and the fourth sub-pixel PX4 may emit a first color of light, the second sub-pixel PX2 and the fifth sub-pixel PX5 may emit a second color of light, and the third sub-pixel PX3 and the sixth sub-pixel PX6 may emit a third color of light. For example, the first color of light, the second color of light, and the third color of light may be blue light, green light, and red light, respectively, but this disclosure is not limited thereto. Alternatively, all sub-pixels PXn may emit light of the same color. Figure 3 and Figure 4 The illustration shows that a pixel PX may include three sub-pixels PXn, but this disclosure is not limited thereto. Alternatively, a pixel PX (e.g., a first pixel PXA or a second pixel PXB) may include more than three sub-pixels PXn.

[0077] Sub-pixels PXn may be arranged along the second direction DR2. When the display device 10 extends longer in the first direction DR1 than in the second direction DR2, sub-pixels PXn may be arranged in the second direction DR2, and sub-pixels of the same type may be arranged along the first direction DR1. However, this disclosure is not limited thereto.

[0078] Each sub-pixel PXn may include an emitting region EMA and a non-emitting region. The emitting region EMA may be a region that outputs light of a specific wavelength range due to the presence of a light-emitting element ED, and the non-emitting region may be a region that does not have a light-emitting element ED present therein and therefore does not output light because the light emitted by the light-emitting element ED does not reach it. The emitting region EMA may include an area in which a light-emitting element ED is disposed and an area around the light-emitting element ED that outputs light emitted by the light-emitting element ED.

[0079] However, this disclosure is not limited thereto. The emission region EMA may also include a region that outputs light emitted by the light-emitting element ED and then reflected or refracted by other components. A plurality of light-emitting elements ED may be disposed in each of the sub-pixels PXn to form the emission region EMA, the emission region EMA including the region in which the plurality of light-emitting elements ED are disposed and the surrounding area of ​​the region in which the plurality of light-emitting elements ED are disposed.

[0080] Figure 3 and Figure 4 The diagram shows that the first emission regions EMA1, EMA2, and EMA3 of the first sub-pixel PX1, second sub-pixel PX2, and third sub-pixel PX3 have substantially the same size, and the fourth emission regions EMA4, EMA5, and EMA6 of the fourth sub-pixel PX4, fifth sub-pixel PX5, and sixth sub-pixel PX6 have substantially the same size, but this disclosure is not limited thereto. In some embodiments, the emission region EMA of the sub-pixel PXn may have different sizes depending on the color or wavelength of the light emitted by the light-emitting element ED.

[0081] Each of the sub-pixels PXn may further include a sub-region SA disposed in the non-emitting area of ​​the display device 10. The sub-region SA of the sub-pixel PXn may be disposed on a first side of the emitting region EMA of the sub-pixel PXn in the first direction DR1, between pairs of emitting regions EMA of adjacent sub-pixels PXn in the first direction DR1. For example, multiple emitting regions EMA may be arranged one after another along the second direction DR2, multiple sub-regions SA (e.g., sub-regions SA1, SA2, and SA3 of the first pixel PXA, or sub-regions SA4, SA5, and SA6 of the second pixel PXB) may be arranged one after another along the second direction DR2, and multiple emitting regions EMA and multiple sub-regions SA may be arranged alternately along the first direction DR1. A third embankment BNL3 may be disposed between adjacent sub-regions SA and emitting regions EMA of the sub-pixel PXn, and the distance between the sub-regions SA and emitting regions EMA of the sub-pixel PXn may vary according to the width of the third embankment BNL3. The electrode RME can be located in the sub-region SA of sub-pixel PXn, where no light-emitting element ED is located and therefore no light is emitted. The electrode RME can be divided within the sub-region SA of sub-pixel PXn.

[0082] In the plan view, the third embankment BNL3 may include portions extending in the first direction DR1 and portions extending in the second direction DR2, and may be arranged in a grid pattern across the entire surface of the display area DPA. The third embankment BNL3 may be positioned along the boundary between sub-pixels PXn to define the sub-pixels PXn. The third embankment BNL3 may be configured to surround the emission region EMA and sub-region SA of the sub-pixels PXn, thereby defining the emission region EMA and sub-region SA of the sub-pixels PXn.

[0083] Figure 5 yes Figure 3 The first type of sub-pixel planar graph. Figure 6 It is along Figure 5 The sectional views taken by lines Q1-Q1', Q2-Q2', and Q3-Q3'. Figure 7 It is along Figure 5 A sectional view taken from line Q4-Q4'. Figure 8 yes Figure 4 The second type of sub-pixel planar graph. Figure 9 It is along Figure 8 The sectional view taken by line Q5-Q5'. Figure 5 The first sub-pixel PX1 of the first pixel PXA is shown as the first type sub-pixel PX#1, and Figure 8 The fourth sub-pixel PX4 of the second pixel PXB is shown as the second type sub-pixel PX#2. Figure 6 and Figure 9A cross-sectional view is shown, taken from one end portion of the light-emitting element ED disposed in a sub-pixel PXn to the other end portion. Figure 7 A cross-sectional view is shown, taken across the contact portions CT1 and CT2 that are in contact with the electrode RME and the contact electrode CNE.

[0084] The following text will refer to Figures 5 to 7 And also refer to Figure 3 The structure of a first type sub-pixel PX#1 of the first pixel PXA is described. The display device 10 may include a first substrate SUB and a semiconductor layer, a plurality of conductive layers, and a plurality of insulating layers disposed on the first substrate SUB. The semiconductor layer, conductive layers, and insulating layers may form the circuit layer CCL and the display element layer of the display device 10.

[0085] The first substrate SUB can be an insulating substrate. The first substrate SUB can be formed of an insulating material such as glass, quartz, or polymer resin. The first substrate SUB can be a rigid substrate or a flexible substrate that is bendable, foldable, or rollable.

[0086] A first conductive layer may be disposed on a first substrate SUB. The first conductive layer includes a lower metal layer BML, and the lower metal layer BML is disposed to overlap with the active layer ACT1 of the first transistor T1. The lower metal layer BML may include a material capable of blocking light transmission and preventing light from incident on the active layer ACT1 of the first transistor T1. In some embodiments, the lower metal layer BML may not be disposed.

[0087] The buffer layer BL can be disposed on the lower metal layer BML and the entire surface of the first substrate SUB. The buffer layer BL can be formed on the first substrate SUB to protect the transistor of the first sub-pixel PX1 from moisture that can penetrate the first substrate SUB (which is susceptible to moisture), and can perform surface planarization function.

[0088] A semiconductor layer is disposed on the buffer layer BL. The semiconductor layer may include the active layer ACT1 of the first transistor T1. The active layer ACT1 may be configured in the thickness direction of the first substrate SUB (e.g., Figure 6 The gate electrode G1 in the second conductive layer (DR3) partially overlaps with the gate electrode G1 in the second conductive layer, which will be described later.

[0089] The semiconductor layer may include polycrystalline silicon, monocrystalline silicon, or oxide semiconductors. When the semiconductor layer includes an oxide semiconductor, the active layer ACT1 may include multiple conductor regions and channel regions between the conductor regions. The oxide semiconductor may be an oxide semiconductor containing indium (In). For example, the oxide semiconductor may be at least one of indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), indium zinc tin oxide (IZTO), indium gallium tin oxide (IGTO), and indium gallium zinc tin oxide (IGZTO).

[0090] Alternatively, the semiconductor layer may comprise polycrystalline silicon that can be formed from crystallized amorphous silicon. In this case, the conductor region of the active layer ACT1 may be a region doped with impurities, but this disclosure is not limited thereto.

[0091] Figure 6 Only the first transistor T1 is shown, but this disclosure is not limited thereto. That is, the first sub-pixel PX1 may include other transistors besides the first transistor T1. For example, the display device 10 may include two or three transistors in the first sub-pixel PX1, including the first transistor T1.

[0092] A first gate insulating layer GI is disposed on the semiconductor layer and the buffer layer BL. The first gate insulating layer GI can be used as the gate insulating film of the transistor of the first sub-pixel PX1.

[0093] A second conductive layer is disposed on the first gate insulating layer GI. The second conductive layer may include the gate electrode G1 of the first transistor T1 and the first capacitor electrode CSE1 of the storage capacitor. The gate electrode G1 may be configured to overlap with the channel region of the active layer ACT1 in the thickness direction. The first capacitor electrode CSE1 may be configured to overlap with the second capacitor electrode CSE2, which will be described later, in the thickness direction. In some embodiments, the first capacitor electrode CSE1 may be integrally formed with and connected to the gate electrode G1.

[0094] A first interlayer insulating layer IL1 is disposed on the second conductive layer. The first interlayer insulating layer IL1 can be used as an insulating film between the second conductive layer and the layer disposed on the second conductive layer. The first interlayer insulating layer IL1 can be configured to cover and protect the second conductive layer.

[0095] The third conductive layer is disposed on the first interlayer insulating layer IL1. The third conductive layer may include the first source electrode S1 and the first drain electrode D1 of the first transistor T1, as well as the second capacitor electrode CSE2.

[0096] The first source electrode S1 and the first drain electrode D1 of the first transistor T1 can contact the doped region of the active layer ACT1 through contact holes penetrating the first interlayer insulating layer IL1 and the first gate insulating layer GI. The first source electrode S1 of the first transistor T1 can contact the lower metal layer BML through another contact hole penetrating the first interlayer insulating layer IL1, the first gate insulating layer GI and the buffer layer BL.

[0097] The second capacitor electrode CSE2 is configured to overlap with the first capacitor electrode CSE1 in the thickness direction. For example, the second capacitor electrode CSE2 may be integrally formed with and connected to the first source electrode S1. A storage capacitor may be formed between the first capacitor electrode CSE1 and the second capacitor electrode CSE2.

[0098] Although not specifically shown, the third conductive layer may also include data lines for applying data signals to transistors other than the first transistor T1. The data lines may be connected to the source / drain electrodes of the other transistors and transmit signals to those electrodes.

[0099] The second interlayer insulating layer IL2 is disposed on the third conductive layer. The second interlayer insulating layer IL2 can serve as an insulating film between the third conductive layer and the layers disposed on the third conductive layer. The second interlayer insulating layer IL2 can be configured to cover and protect the third conductive layer.

[0100] A fourth conductive layer is disposed on the second interlayer insulating layer IL2. The fourth conductive layer may include a first voltage line VL1, a second voltage line VL2, and a first conductive pattern CDP. A high potential voltage (or a first power supply voltage) to be supplied to the first transistor T1 can be applied to the first voltage line VL1, and a low potential voltage (or a second power supply voltage) to be supplied to the second electrode RME2 or the fourth electrode RME4 can be applied to the second voltage line VL2.

[0101] The first conductive pattern CDP can be connected to the second capacitor electrode CSE2, and thereby electrically connected to the first transistor T1. The first conductive pattern CDP can contact the first electrode RME1, which will be described later, and the first transistor T1 can transmit a first power supply voltage applied thereto from the first voltage line VL1 to the first electrode RME1. The fourth conductive layer is shown as including a first voltage line VL1 and a second voltage line VL2, but this disclosure is not limited thereto. That is, the fourth conductive layer may include more than one first voltage line VL1 and more than one second voltage line VL2.

[0102] Each of the buffer layer BL, the first gate insulating layer GI, the first interlayer insulating layer IL1, and the second interlayer insulating layer IL2 may consist of a plurality of alternately stacked inorganic layers. For example, each of the buffer layer BL, the first gate insulating layer GI, the first interlayer insulating layer IL1, and the second interlayer insulating layer IL2 may be formed in which silicon oxide (SiO2) is disposed. x ), silicon nitride (SiN) x ) and silicon nitride oxide (SiO) x N y The present disclosure is not limited to the alternating stacking of at least one inorganic layer of silicon oxide (SiO2). In another example, each of the buffer layer BL, the first gate insulating layer GI, the first interlayer insulating layer IL1, and the second interlayer insulating layer IL2 may be formed as comprising silicon oxide (SiO2). x ), silicon nitride (SiN) x ) or silicon nitride oxide (SiO) x N y A single inorganic layer.

[0103] The second, third, and fourth conductive layers may be formed as a single layer or multiple layers of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu), or alloys thereof, but this disclosure is not limited thereto.

[0104] The third interlayer insulating layer IL3 is disposed on the fourth conductive layer. The third interlayer insulating layer IL3 may include an organic insulating material such as, for example, polyimide (PI), and may perform a surface planarization function.

[0105] Multiple first diaphragms BNL1, multiple electrodes RME, light-emitting elements ED, multiple contact electrodes CNE, and a third diaphragm BNL3 are disposed as display element layers on the third interlayer insulating layer IL3. Furthermore, multiple insulating layers PAS1, PAS2, and PAS3 may also be disposed on the third interlayer insulating layer IL3.

[0106] The first embankment BNL1 may be spaced apart from each other in the first emission region EMA1. For example, the first embankment BNL1 may include a plurality of sub-embankments BNL_A and BNL_B spaced apart from each other in the second direction DR2 in the first emission region EMA1. The first sub-embankment BNL_A may be located on the upper left side of the center of the first emission region EMA1, and the second sub-embankment BNL_B may be located on the upper right side of the center of the first emission region EMA1. The sub-embankments BNL_A and BNL_B may extend in the first direction DR1, and the length of the sub-embankments BNL_A and BNL_B may be less than the length of the opening surrounded by the third embankment BNL3 in the first direction DR1. The two first sub-embankments BNL_A and the two second sub-embankments BNL_B may be spaced apart from each other in the first sub-pixel PX1 in the first direction DR1. The first embankment BNL1 may form an island pattern extending in one direction across the entire surface of the display region DPA.

[0107] At least a portion of the first dam portion BNL1 may protrude from the top surface of the third interlayer insulating layer IL3. Each of the protruding portions of the first dam portion BNL1 may have a sloping side surface, and light emitted by the light-emitting element ED may be reflected by an electrode RME disposed on the first dam portion BNL1 to be emitted from the third interlayer insulating layer IL3 in an upward direction. The side surface of each of the first dam portions BNL1 may be linearly sloping, but this disclosure is not limited thereto. Alternatively, the outer surface of the first dam portion BNL1 may have a semi-circular or semi-elliptical shape with curvature. The first dam portion BNL1 may comprise an organic insulating material such as polyimide, but this disclosure is not limited thereto.

[0108] Multiple electrodes RMEs may extend in one direction and may be disposed in each of the sub-pixels PXn. For example, multiple electrodes RMEs may extend in a first direction DR1 and may be disposed in the first sub-pixel PX1 such that they are spaced apart from each other in the first direction DR1 and the second direction DR2. For example, electrodes RMEs may be divided into electrode groups RME#1 and RME#2, each comprising electrodes RMEs arranged side by side along the second direction DR2 and spaced apart from each other, and electrode groups RME#1 and RME#2 may be spaced apart from each other in the first direction DR1.

[0109] For example, electrode groups RME#1 and RME#2 may include a first electrode group RME#1 and a second electrode group RME#2 spaced apart from each other in a first direction DR1. The first electrode group RME#1 may be disposed on one side of the center of the first emission region EMA1 in the first direction DR1, for example, on the upper side of the center of the first emission region EMA1, and the second electrode group RME#2 may be disposed on the other side of the center of the first emission region EMA1 in the first direction DR1, for example, on the lower side of the center of the first emission region EMA1. The first electrode group RME#1 and the second electrode group RME#2 may be spaced apart from each other by a first separation portion ROP1 disposed in the first emission region EMA1.

[0110] The electrodes RME in the first electrode group RME#1 can be partially disposed in the first sub-region SA1 of the first sub-pixel PX1, extending beyond the third embankment BNL3, and the electrodes RME in the second electrode group RME#2 can be disposed in the sub-region SA of the adjacent sub-pixel PXn of the first sub-pixel PX1, extending beyond the third embankment BNL3. That is, the first electrode group RME#1 and the second electrode group RME#2 from different sub-pixels PXn can be disposed in one sub-region SA. The first electrode group RME#1 and the second electrode group RME#2 from different sub-pixels PXn can be separated from each other by the second separation portion ROP2 disposed in one sub-region SA.

[0111] Electrodes RME from different electrode groups RME#1 and RME#2 may be spaced apart from each other in the first direction DR1. For example, the electrode RME in the first electrode group RME#1 may be arranged alongside the electrode RME in the second electrode group RME#2 in the first direction DR1. For example, the electrode RME in the first electrode group RME#1 may be arranged side by side in the second direction DR2. The electrode RME in the second electrode group RME#2 may also be arranged side by side in the second direction DR2. The electrode RME may be obtained by forming a single electrode line extending in the first direction DR1 and then dividing each of the electrode lines. The electrode lines may be used to form an electric field in the first sub-pixel PX1 to align the light-emitting element ED during the manufacture of the display device 10. The light-emitting element ED may be aligned on the electrode RME by the dielectric force from the electric field generated between two adjacent electrode lines. Once the light-emitting element ED is aligned, the electrode lines may be divided in the first separation portion ROP1 and the second separation portion ROP2, thereby forming electrode groups RME#1 and RME#2 spaced apart from each other in the first direction DR1.

[0112] Figure 5The first electrode group RME#1 and the second electrode group RME#2 are shown to be separated from each other in the first separation portion ROP1 of the first emission region EMA1, but this disclosure is not limited thereto. Alternatively, in some embodiments, the electrodes RME may not be divided into different electrode groups RME#1 and RME#2 in the first separation portion ROP1, but may be connected throughout the entire first sub-pixel PX1. The number of electrodes RME included in each of the electrode groups RME#1 and RME#2 may vary depending on the number of light-emitting elements ED disposed in the first sub-pixel PX1.

[0113] The first electrode group RME#1 may include a first electrode RME1 and a second electrode RME2, and the second electrode group RME#2 may include a third electrode RME3 and a fourth electrode RME4. The electrodes RME may be disposed on a plurality of first embankments BNL1 spaced apart from each other.

[0114] The first electrode RME1 can be disposed on the upper left side of the center of the first emission region EMA1. The first electrode RME1 can also be partially disposed on the upper side of the center of the first emission region EMA1 on the first sub-dike portion BNL_A. The second electrode RME2 can be spaced apart from the first electrode RME1 in the second direction DR2, and can be disposed on the upper right side of the center of the first emission region EMA1. The second electrode RME2 can also be partially disposed on the upper side of the center of the first emission region EMA1 on the second sub-dike portion BNL_B.

[0115] The third electrode RME3 may be disposed on the lower left side of the center of the first emission region EMA1, and may be spaced apart from the first electrode RME1 in the first direction DR1. The third electrode RME3 may be partially disposed on the upper lower side of the center of the first emission region EMA1 on the first sub-dike portion BNL_A. The fourth electrode RME4 may be disposed on the lower right side of the center of the first emission region EMA1, and may be spaced apart from the second electrode RME2 in the first direction DR1. The fourth electrode RME4 may be partially disposed on the upper lower side of the center of the first emission region EMA1 on the second sub-dike portion BNL_B.

[0116] For example, the first electrode RME1 and the fourth electrode RME4 can be first-type electrodes connected to a fourth conductive layer disposed below them. For example, the first electrode RME1 can be formed in the region overlapping with the third embankment BNL3 and can be directly connected to the first conductive pattern CDP of the fourth conductive layer through the first electrode contact hole CTD penetrating the third interlayer insulating layer IL3. For example, the fourth electrode RME4 can be formed in the region overlapping with the third embankment BNL3 and can be directly connected to the second voltage line VL2 of the fourth conductive layer through the second electrode contact hole CTS penetrating the third interlayer insulating layer IL3.

[0117] The first electrode RME1 is electrically connected to the first transistor T1 via the first conductive pattern CDP and thus can receive the first power supply voltage, and the second electrode RME2 is electrically connected to the second voltage line VL2 and thus can receive the second power supply voltage. The second electrode RME2 and the third electrode RME3 can receive the first power supply voltage and the second power supply voltage via the contact electrode CNE, which will be described later. Because the electrodes RME are arranged to be divided in each of the sub-pixels PXn, the light-emitting element ED of one sub-pixel PXn can emit light independently of the light-emitting element ED of another sub-pixel PXn. The first electrode contact hole CTD and the second electrode contact hole CTS are shown to be formed at a location overlapping with the third embankment BNL3, but the present disclosure is not limited thereto. Alternatively, the first electrode contact hole CTD and the second electrode contact hole CTS can be located in the first emission region EMA1 surrounded by the third embankment BNL3.

[0118] Unlike the first type of electrode, the second electrode RME2 and the third electrode RME3 can be second type electrodes that are not directly connected to the fourth conductive layer. The second type of electrode can receive electrical signals directly applied to the first type of electrode via a light-emitting element (ED) or a contact electrode (CNE). The second electrode RME2 and the third electrode RME3 can be in a floating state, still able to receive electrical signals from the fourth conductive layer, rather than being directly connected to the fourth conductive layer.

[0119] As will be described later, the display device 10 may include sub-pixels PXn with different electrode configurations, and may determine which of the first type electrode and the second type electrode to be connected to the fourth conductive layer based on the electrode configuration of each of the sub-pixels PXn. For example, if there are more second type sub-pixels PX#2 provided than first type sub-pixels PX#1 present, the second electrode RME2 may be a first type electrode directly connected to the fourth conductive layer, and the fourth electrode RME4 may be a second type electrode.

[0120] For example, the width of the electrode RME in the second direction DR2 may be smaller than the width of the first dam BNL1 in the second direction DR2. The electrode RME may be configured to cover at least one side surface of each of the first dams BNL1, and thus be able to reflect light emitted by the light-emitting element ED. The distance between adjacent electrode RMEs in the second direction DR2 may be smaller than the distance between the sub-dams BNL_A and BNL_B of the first dam BNL1. At least a portion of the electrode RME may be directly disposed on the third interlayer insulating layer IL3, and thus may fall on the same plane.

[0121] Electrode RME can be electrically connected to light-emitting element ED. Electrode RME can be connected to two end portions of each of the light-emitting elements ED via contact electrode CNE, which will be described later, and can transmit electrical signals applied from the fourth conductive layer to the light-emitting element ED. Electrical signals for causing the light-emitting element ED to emit light can be directly applied to the first electrode RME1 and the fourth electrode RME4, which are electrodes of the first type, and can be transmitted to other electrodes via contact electrode CNE and light-emitting element ED.

[0122] The electrode RME may include a conductive material with high reflectivity. For example, the electrode RME may include a material with high reflectivity, such as a metal (e.g., silver (Ag), Cu, or Al, or an alloy of Al, Ni, or lanthanum (La)). The electrode RME may reflect upward light emitted by the light-emitting element ED and then traveling toward the side surface of each of the first dikes BNL1 or the side surface of the third dike BNL3.

[0123] However, this disclosure is not limited thereto. Alternatively, the electrode RME may also include a transparent conductive material. For example, the electrode RME may include materials such as ITO, IZO, or indium tin zinc oxide (ITZO). In some embodiments, the electrode RME may be formed as a stack of more than one transparent conductive material layer and more than one metal layer with high reflectivity, or as a monolayer comprising a transparent conductive material and a metal with high reflectivity. For example, the electrode RME may have a stack of ITO / Ag / ITO, ITO / Ag / IZO, or ITO / Ag / ITZO / IZO.

[0124] A first insulating layer PAS1 is disposed on the electrode RME and the first dam BNL1. The first insulating layer PAS1 can be configured to completely cover the electrode RME and the first dam BNL1, and can protect the electrode RME and insulate the electrodes RME from each other. In addition, the first insulating layer PAS1 can prevent (or protect) the light-emitting element ED disposed thereon from direct contact with other components or from being damaged by other components.

[0125] For example, the first insulating layer PAS1 may be formed to be partially recessed between each pair of electrodes RME spaced apart from each other in the second direction DR2. A light-emitting element ED may be disposed on the top surface of the recessed portion of the first insulating layer PAS1, and a space may be formed between the light-emitting element ED and the first insulating layer PAS1. However, this disclosure is not limited to this example.

[0126] The first insulating layer PAS1 may include contact portions CT1 and CT2, also referred to as contact openings CT1 and CT2, that expose the top surface of the electrode RME. Contact portions CT1 and CT2 may penetrate the first insulating layer PAS1, and the contact electrode CNE, described later, may contact the portion of the electrode RME exposed by contact portions CT1 and CT2.

[0127] A third dam portion BNL3 may be disposed on the first insulating layer PAS1. In a plan view, the third dam portion BNL3 may include portions extending in the first direction DR1 and portions extending in the second direction DR2, and may be arranged in a grid pattern. The third dam portion BNL3 may be disposed along the boundary between sub-pixels PXn to define sub-pixels PXn. The third dam portion BNL3 may be disposed around the emission region EMA and sub-region SA of the sub-pixel PXn (or around the emission region EMA and sub-region SA), and thereby define the emission region EMA and sub-region SA of the sub-pixel PXn. The portion of the third dam portion BNL3 extending in the first direction DR1 may have a greater width between the emission regions EMA of adjacent sub-pixels PXn than between the sub-region SAs of the sub-pixels PXn, but this disclosure is not limited thereto. Alternatively, the portion of the third dam portion BNL3 extending in the first direction DR1 may have a greater width between adjacent sub-region SAs of the sub-pixel PXn than between the emission regions EMA of adjacent sub-pixels PXn.

[0128] The third dam portion BNL3 may be formed to have a greater height than the first dam portion BNL1. The third dam portion BNL3 prevents ink ejected from one sub-pixel PXn during inkjet printing from spilling into other adjacent sub-pixels PXn, and thereby prevents ink from mixing between different sub-pixels PXn. Similar to the first dam portion BNL1, the third dam portion BNL3 may include polyimide, but this disclosure is not limited thereto.

[0129] The light-emitting elements (EDs) may be disposed on the first insulating layer PAS1. The EDs may be arranged spaced apart from each other in the direction in which the electrodes RME extend (i.e., in the first direction DR1) and may be aligned substantially parallel to each other. The EDs may extend in one direction, and the direction in which the electrodes RME extend may form approximately a right angle with the direction in which the EDs extend. However, this disclosure is not limited thereto. Alternatively, the EDs may be arranged diagonally relative to the direction in which the electrodes RME extend.

[0130] Each of the light-emitting elements (EDs) may include a semiconductor layer doped with a different conductivity type. Because each of the EDs includes multiple semiconductor layers, the EDs can be aligned such that a first end portion of each ED faces a specific orientation according to the direction of the electric field formed on the electrode RME. Furthermore, each of the EDs may include a light-emitting layer 36 (see, for example...). Figure 13 And thus can emit light within a specific wavelength range. The light-emitting layer 36 of different light-emitting elements ED can emit light within different wavelength ranges depending on their materials, but this disclosure is not limited thereto. Alternatively, different light-emitting elements ED can emit light of the same color.

[0131] Multiple layers may be arranged in each of the light-emitting elements ED in a direction parallel to the top surface of the first substrate SUB. The light-emitting elements ED may be arranged such that the direction in which the light-emitting elements ED extend may be parallel to the first substrate SUB, and the semiconductor layers included in each of the light-emitting elements ED may be sequentially arranged in a direction parallel to the top surface of the first substrate SUB. However, this disclosure is not limited thereto. Alternatively, the multiple layers included in each of the light-emitting elements ED may be arranged in a direction perpendicular to the first substrate SUB.

[0132] Light-emitting elements (EDs) can be disposed between first diaphragm portions (BNL1) on electrodes (RMEs) spaced apart from each other in the second direction (DR2). The length of the light-emitting element (ED) can be greater than the distance between the electrodes (RMEs) in the second direction (DR2), and the two end portions of each light-emitting element (ED) can be disposed on different electrodes (RMEs). For example, the light-emitting element (ED) may include a first light-emitting element (ED1) and a second light-emitting element (ED2), the first light-emitting element (ED1) having two end portions disposed on the first electrode (RME1) and the second electrode (RME2) classified as the first electrode group (RME#1), and the second light-emitting element (ED2) having two end portions disposed on the third electrode (RME3) and the fourth electrode (RME4) classified as the second electrode group (RME#2).

[0133] Because each of the light-emitting elements (EDs) comprises multiple semiconductor layers, the first end portion and the second end portion of each ED can be defined based on one of the semiconductor layers. The first end portion and the second end portion of each ED can be disposed on different electrodes RMEs. For example, the first end portion and the second end portion of each of the first light-emitting elements ED1 can be disposed on the first electrode RME1 and the second electrode RME2, respectively, and the first end portion and the second end portion of each of the second light-emitting elements ED2 can be disposed on the third electrode RME3 and the fourth electrode RME4, respectively. The first end portion and the second end portion of each ED can be electrically connected to different electrodes RMEs, but this disclosure is not limited thereto. Alternatively, depending on the orientation of the EDs aligned between the electrodes RMEs, at least some of the EDs may have only one end portion disposed on an electrode RME, or may have first end portions and second end portions disposed in different orientations.

[0134] Each of the light-emitting elements ED has two end portions that can contact the contact electrode CNE. This is because no insulating film 38 is formed at the two end portions of each of the light-emitting elements ED (see, for example...). Figure 13The insulating film 38 is used to expose a portion of the semiconductor layer of each of the light-emitting elements ED, so that the exposed semiconductor layer can contact the contact electrode CNE, but this disclosure is not limited thereto. Alternatively, at least a portion of the insulating film 38 may be removed, such that a portion of the side surface of the semiconductor layer of each of the light-emitting elements ED may be exposed. The exposed side surface of the semiconductor layer may be in direct contact with the contact electrode CNE. The two end portions of each of the light-emitting elements ED may be electrically connected to the electrode RME via the contact electrode CNE.

[0135] The second insulating layer PAS2 may be disposed on a portion of the light-emitting element ED. For example, the second insulating layer PAS2 may be disposed around a portion of the outer surface of the light-emitting element ED, but not covering the first end portion and the second end portion of each of the light-emitting elements ED. In a plan view, because the second insulating layer PAS2 is disposed on the light-emitting element ED extending in the second direction DR2 above the first insulating layer PAS1, the second insulating layer PAS2 may form a linear pattern or an island pattern in the first sub-pixel PX1.

[0136] The second insulating layer PAS2 can be directly disposed on the first insulating layer PAS1 between the first embankment BNL1 and the third embankment BNL3. That is, the second insulating layer PAS2 can be disposed not only on the light-emitting element ED in the first emitting region EMA1, but also on the first insulating layer PAS1 and the third embankment BNL3, to expose the two end portions of each of the light-emitting elements ED and the area where the electrode RME is disposed. The second insulating layer PAS2 can be initially disposed on the entire surface of the first insulating layer PAS1 during the manufacture of the display device 10, and can then be partially removed to expose the two end portions of each of the light-emitting elements ED. The second insulating layer PAS2 can protect and fix the light-emitting element ED during the manufacture of the display device 10. In addition, the second insulating layer PAS2 can be configured to fill the space between the light-emitting element ED and the first insulating layer PAS1.

[0137] Although not specifically shown, the second insulating layer PAS2 may be partially disposed in the first sub-region SA1. The electrode RME may be initially configured to extend along the first direction DR1 and be connected throughout the entire first sub-pixel PX1, and then each electrode RME may be divided into two parts in the sub-region SA after aligning the light-emitting element ED and forming the second insulating layer PAS2. During the division of the electrode RME, not only the electrode RME but also the first insulating layer PAS1 and the second insulating layer PAS2 may be partially removed, and the third insulating layer PAS3 may be directly disposed on the third interlayer insulating layer IL3 in the area where the electrode RME and the first insulating layers PAS1 and PAS2 are partially removed. However, this disclosure is not limited thereto. Alternatively, the third insulating layer PAS3 may also be removed from the first sub-region SA1 where the electrode RME is divided, and thus the third interlayer insulating layer IL3 may be partially exposed. Still alternatively, another insulating layer disposed on the third insulating layer PAS3 to cover other elements may be directly disposed on the third interlayer insulating layer IL3.

[0138] The contact electrode CNE and the third insulating layer PAS3 may be disposed on the second insulating layer PAS2. The contact electrode CNE may contact at least one end portion of each of the light-emitting elements ED and at least one of the electrodes RME. For example, the contact electrode CNE may contact at least one end portion of each of the light-emitting elements ED exposed by the second insulating layer PAS2, and contact at least one of the electrodes RME through contact portions CT1 and CT2 formed in the first insulating layer PAS1 to expose portions of the electrodes RME.

[0139] The contact electrode CNE may include different types of contact electrodes electrically connected to different types of electrodes RME. For example, the contact electrode CNE may include a first type of contact electrode (i.e., first contact electrode CNE1 and second contact electrode CNE2) disposed on a first type of electrode (i.e., first electrode RME1 and fourth electrode RME4).

[0140] First contact electrode CNE1 and second contact electrode CNE2 may be respectively disposed on portions of first electrode RME1 and fourth electrode RME4. First contact electrode CNE1 and second contact electrode CNE2 may extend in a first direction DR1 and may form a linear pattern in the first emission region EMA1. First contact electrode CNE1 may contact first electrode RME1 through a first contact portion CT1 exposing the top surface of first electrode RME1, and second contact electrode CNE2 may contact fourth electrode RME4 through a first contact portion CT1 exposing the top surface of fourth electrode RME4. Furthermore, first contact electrode CNE1 may contact a first end portion of first light-emitting element ED1, and second contact electrode CNE2 may contact a second end portion of second light-emitting element ED2.

[0141] The first contact electrode CNE1 and the second contact electrode CNE2, serving as first-type contact electrodes, can transmit electrical signals applied to the first-type electrodes to one end portion of each of the light-emitting elements ED. The electrical signals can be directly applied to the first end portion of the first light-emitting element ED1 and the second end portion of the second light-emitting element ED2, and can then be transmitted via the second end portion of the first light-emitting element ED1 and the first end portion of the second light-emitting element ED2 to the other contact electrodes CNE and the other light-emitting elements ED.

[0142] The contact electrode CNE may also include a second type of contact electrode (i.e., a third contact electrode CNE3) disposed across the second type of electrode (i.e., the second electrode RME2 and the third electrode RME3).

[0143] A third contact electrode CNE3 may be disposed on the second electrode RME2 and the third electrode RME3. The third contact electrode CNE3 may include a first extension CN_E1 and a second extension CN_E2 extending in the first direction DR1, and a first connecting portion CN_B1 connecting the first extension CN_E1 and the second extension CN_E2 in the first separation portion ROP1. The third contact electrode CNE3 may extend substantially in the first direction DR1 and may have a curved shape to be disposed on the second electrode RME2 and the third electrode RME3. The first extension CN_E1 may be disposed on the second electrode RME2 to contact the second electrode RME2 and the first light-emitting element ED1. The first extension CN_E1 may contact the second end portion of the first light-emitting element ED1 and the portion of the second electrode RME2 exposed by the second contact portion CT2. The second extension CN_E2 may be disposed on the third electrode RME3 to contact the third electrode RME3 and the second light-emitting element ED2. The second extension CN_E2 may contact the first end portion of the second light-emitting element ED2 and the portion of the third electrode RME3 exposed by the second contact portion CT2. The first connecting part CN_B1 may extend in the first separating part ROP1 in the second direction DR2.

[0144] The first light-emitting element ED1 and the second light-emitting element ED2 can be electrically connected via a third contact electrode CNE3. An electrical signal applied via the first contact electrode CNE1 can be transmitted to the second light-emitting element ED2 via the first light-emitting element ED1 and the third contact electrode CNE3. The light-emitting elements ED can be connected in series via a second type of contact electrode (e.g., the third contact electrode CNE3).

[0145] Contact portions CT1 and CT2 formed in the region where the contact electrode CNE contacts the electrode RME can be configured not to overlap with the light-emitting element ED in the second direction DR2. For example, contact portions CT1 and CT2 can be separated from the area where the light-emitting element ED is disposed in the first direction DR1, so as to be adjacent to the portion of the third embankment BNL3 extending in the second direction DR2. The light-emitting element ED emits light through its two end portions, and contact portions CT1 and CT2 can be configured to avoid the path of the light emitted by the light-emitting element ED, but this disclosure is not limited thereto. The positions of contact portions CT1 and CT2 can vary depending on the structure of the electrode RME and the position of the light-emitting element ED.

[0146] Figure 5 and Figure 6 The illustration shows a first contact electrode CNE1, a second contact electrode CNE2, and a third contact electrode CNE3 disposed in the first sub-pixel PX1, but this disclosure is not limited thereto. The number and shape of the contact electrodes CNE can vary depending on the number of electrodes RME disposed in the first sub-pixel PX1.

[0147] The contact electrode CNE may include a conductive material. For example, the contact electrode CNE may include ITO, IZO, ITZO, or aluminum (Al). For example, the contact electrode CNE may include a transparent conductive material, and light emitted from the light-emitting element ED can pass through the contact electrode CNE and thus travel toward the electrode RME. However, this disclosure is not limited thereto.

[0148] Some of the contact electrodes CNEs may be disposed in the same layer, while others may be disposed in another layer. For example, a third contact electrode CNE3 may be disposed on the second insulating layer PAS2, and a first contact electrode CNE1 and a second contact electrode CNE2 may be disposed on the third insulating layer PAS3. The third contact electrode CNE3 may be disposed in the area where the second insulating layer PAS2 is patterned and exposed, and the first contact electrode CNE1 and the second contact electrode CNE2 may be disposed in the area where the second insulating layer PAS2 and the third insulating layer PAS3 are patterned and exposed. The first contact electrode CNE1 and the second contact electrode CNE2 may be disposed directly on the first insulating layer PAS1 in the area where the second insulating layer PAS2 and the third insulating layer PAS3 are not disposed, thus exposing the two end portions of each of the light-emitting elements ED.

[0149] The third insulating layer PAS3 is disposed on the third contact electrode CNE3. The third insulating layer PAS3 may also be disposed on the entire second insulating layer PAS2 (except for the area where the first contact electrode CNE1 and the second contact electrode CNE2 are disposed). The third insulating layer PAS3 insulates the first contact electrode CNE1 and the second contact electrode CNE2 from the third contact electrode CNE3, so that the first contact electrode CNE1 and the second contact electrode CNE2 do not directly contact the third contact electrode CNE3.

[0150] A third insulating layer PAS3 may be disposed between the first contact electrode CNE1 and the third contact electrode CNE3 to insulate the first contact electrode CNE1 and the third contact electrode CNE3 from each other. Alternatively, as mentioned above, the third insulating layer PAS3 may not be provided, in which case the first contact electrode CNE1 and the third contact electrode CNE3 may be disposed in the same layer.

[0151] Although not specifically shown, insulating layers may also be provided on the contact electrode CNE, the third insulating layer PAS3, and the third embankment BNL3 to cover the contact electrode CNE, the third insulating layer PAS3, and the third embankment BNL3. The insulating layers may be provided on the entire surface of the first substrate SUB to protect the components disposed on the first substrate SUB from the influence of the external environment.

[0152] The first insulating layer PAS1, the second insulating layer PAS2, and the third insulating layer PAS3 may comprise inorganic or organic insulating materials, but this disclosure is not limited thereto.

[0153] The display device 10 may also include a device having the above reference. Figure 5 and Figure 6 The second type of sub-pixel PX#2 is described as having a different electrode configuration than the first type of sub-pixel PX#1. The second type of sub-pixel PX#2 includes more electrodes RME and more contact electrodes CNE than the first type of sub-pixel PX#1, and therefore can provide a greater number of series connections between light-emitting elements ED.

[0154] The following text will refer to Figure 8 and Figure 9 Describes the second type of subpixel PX#2 of the second pixel PXB. (Reference) Figure 8 and Figure 9 The sub-pixel PXn of the second pixel PXB is comparable Figures 5 to 7 The first pixel PXA's sub-pixel PXn includes more electrodes RME and more contact electrodes CNE. The second pixel PXB's fourth sub-pixel PX4... Figures 5 to 7 The difference between the first sub-pixel PX1 of the first pixel PXA and the second sub-pixel PX4 of the second pixel PXB is that the fourth sub-pixel PX4 includes a second embankment BNL2 and includes a relatively large number of electrodes RME and contact electrodes CNE. The following will focus mainly on the... Figures 5 to 7 To describe the differences in the first sub-pixel PX1 Figure 8 and Figure 9 The fourth sub-pixel, PX4.

[0155] The fourth sub-pixel PX4 of the second pixel PXB may further include a second dam BNL2 disposed between each pair of first dams BNL1 spaced apart from each other in the second direction DR2. Similar to the first dams BNL1, the second dam BNL2 may be directly disposed on the third interlayer insulating layer IL3. The second dam BNL2 may extend in the first direction DR1 and may have a relatively large width in part of the fourth emission region EMA4 of the fourth sub-pixel PX4. For example, the portion of the second dam BNL2 facing the first dam BNL1 may be formed to have a relatively large width, and the second dam BNL2 may extend in the first direction DR1 between the first sub-dam BNL_A and the second sub-dam BNL_B. Unlike the first dam BNL1, the second dam BNL2 may even extend beyond the fourth emission region EMA4 into the fourth sub-region SA4 of the fourth sub-pixel PX4. The second dam BNL2 may even be disposed in the adjacent sub-pixels PXn of the fourth sub-pixel PX4 in the first direction DR1 to form a linear pattern throughout the entire display area DPA.

[0156] The fourth sub-pixel PX4 may include a first electrode group RME#1 and a second electrode group RME#2, and the first electrode group RME#1 and the second electrode group RME#2 are comparable. Figures 5 to 7 Each of their corresponding portions includes more electrodes RME. The first electrode group RME#1 may include the first electrode RME1 and the second electrode RME2, and may also include the fifth electrode RME5 and the sixth electrode RME6, and the second electrode group RME#2 may include the third electrode RME3 and the fourth electrode RME4, and may also include the seventh electrode RME7 and the eighth electrode RME8.

[0157] and Figures 5 to 7 Unlike the first sub-pixel PX1 (i.e., the first type sub-pixel PX#1), the fourth sub-pixel PX4 (i.e., the second type sub-pixel PX#2) may have a second electrode RME2 (i.e., the first type electrode) directly connected to the second voltage line VL2 via the second electrode contact hole CTS. The fourth electrode RME4, as the second type electrode, may not be directly connected to the fourth conductive layer. The second electrode RME2 and the fourth electrode RME4 may be spaced apart from the first electrode RME1 and the third electrode RME3, and may be positioned adjacent to the center of the fourth emission region EMA4. The second electrode RME2 and the fourth electrode RME4 may be partially disposed on the side of the second embankment BNL2 facing the second sub-embankment BNL_B.

[0158] The fifth electrode RME5 can be disposed between the first electrode RME1 and the second electrode RME2. The fifth electrode RME5 can be spaced apart from and facing the first electrode RME1, and can also be disposed on the second embankment BNL2 to be spaced apart from the second electrode RME2. The fifth electrode RME5 can be partially disposed on the upper side of the fourth emission region EMA4, on the side of the second embankment BNL2 opposite to the first sub-embankment BNL_A. The sixth electrode RME6 can be spaced apart from and facing the second electrode RME2, and can be disposed on the upper right side of the center of the fourth emission region EMA4. The sixth electrode RME6 can be partially disposed on the upper side of the fourth emission region EMA4, on the second sub-embankment BNL_B.

[0159] The seventh electrode RME7 can be disposed between the third electrode RME3 and the fourth electrode RME4, and can be spaced apart from the fifth electrode RME5 in the first direction DR1. The seventh electrode RME7 can be spaced apart from the third electrode RME3 and face the third electrode RME3, and can be disposed on the second embankment BNL2 to be spaced apart from the fourth electrode RME4. The seventh electrode RME7 can be partially disposed on the lower upper side of the fourth emission region EMA4 on the side of the second embankment BNL2 opposite to the first sub-embankment BNL_A. The eighth electrode RME8 can be spaced apart from the fourth electrode RME4 and face the fourth electrode RME4, and can be disposed on the lower right side of the center of the fourth emission region EMA4. The eighth electrode RME8 can be partially disposed on the lower upper side of the fourth emission region EMA4 on the second sub-embankment BNL_B.

[0160] Unlike the first type of electrodes, the fifth electrode RME5, the sixth electrode RME6, the seventh electrode RME7, and the eighth electrode RME8 can be second type electrodes that are not directly connected to the fourth conductive layer. The distance between the electrodes RME in the second direction DR2 can be less than the distance between the first embankment BNL1 and the second embankment BNL2 in the second direction DR2. At least a portion of the electrodes RME can be directly disposed on the third interlayer insulating layer IL3, and therefore can fall on the same plane.

[0161] Because the fourth sub-pixel PX4, which is the second type sub-pixel PX#2, includes a relatively large number of electrodes RME, the fourth sub-pixel PX4 can include a relatively large number of light-emitting elements ED connected in series. For example, the fourth sub-pixel PX4 can include a first light-emitting element ED1 having two end portions disposed on the first electrode RME1 and the fifth electrode RME5, a second light-emitting element ED2 having two end portions disposed on the second electrode RME2 and the sixth electrode RME6, a third light-emitting element ED3 having two end portions disposed on the third electrode RME3 and the seventh electrode RME7, and a fourth light-emitting element ED4 having two end portions disposed on the fourth electrode RME4 and the eighth electrode RME8.

[0162] The first end portion of the first light-emitting element ED1 may be disposed on the first electrode RME1, and the second end portion of the first light-emitting element ED1 may be disposed on the fifth electrode RME5. The first end portion of the second light-emitting element ED2 may be disposed on the sixth electrode RME6, and the second end portion of the second light-emitting element ED2 may be disposed on the second electrode RME2. Similarly, the first end portion of the third light-emitting element ED3 may be disposed on the third electrode RME3, and the second end portion of the third light-emitting element ED3 may be disposed on the seventh electrode RME7. The first end portion of the fourth light-emitting element ED4 may be disposed on the eighth electrode RME8, and the second end portion of the fourth light-emitting element ED4 may be disposed on the fourth electrode RME4.

[0163] Because the fourth sub-pixel PX4, which is the second type sub-pixel PX#2, includes a relatively large number of light-emitting elements ED that can be connected in series, the fourth sub-pixel PX4 may correspondingly include a relatively large number of contact electrodes CNE. The contact electrodes CNE may include a first contact electrode CNE1, a second contact electrode CNE2, and a third contact electrode CNE3, and may also include a fourth contact electrode CNE4 and a fifth contact electrode CNE5.

[0164] The first contact electrode CNE1 and the second contact electrode CNE2 may be partially disposed on the first electrode RME1 and the second electrode RME2, respectively. The first contact electrode CNE1 may contact the first end portion of the first light-emitting element ED1, and the second contact electrode CNE2 may contact the second end portion of the second light-emitting element ED2.

[0165] The third contact electrode CNE3 may be disposed on the third electrode RME3 and the fifth electrode RME5. The third contact electrode CNE3 may include a first extension CN_E1 disposed on the fifth electrode RME5, a second extension CN_E2 disposed on the third electrode RME3, and a first connecting portion CN_B1 connecting the first extension CN_E1 and the second extension CN_E2 and disposed in the first separation portion ROP1. The first extension CN_E1 may contact the second end portion of the first light-emitting element ED1 and the portion of the fifth electrode RME5 exposed by the second contact portion CT2. The second extension CN_E2 may contact the first end portion of the third light-emitting element ED3 and the portion of the third electrode RME3 exposed by another second contact portion CT2.

[0166] The fourth contact electrode CNE4 may be disposed on the seventh electrode RME7 and the eighth electrode RME8. The fourth contact electrode CNE4 may include a third extension CN_E3 and a fourth extension CN_E4 extending in the first direction DR1, and a second connecting portion CN_B2 connecting the third extension CN_E3 and the fourth extension CN_E4 on the lower side of the fourth emission region EMA4. The second connecting portion CN_B2 may connect the third extension CN_E3 and the fourth extension CN_E4 in a region other than the first separation portion ROP1. The third extension CN_E3 may be disposed on the seventh electrode RME7 to contact the seventh electrode RME7 and the second end portion of the third light-emitting element ED3. The fourth extension CN_E4 may be disposed on the eighth electrode RME8 to contact the eighth electrode RME8 and the first end portion of the fourth light-emitting element ED4. The fourth contact electrode CNE4 may be spaced apart from the fifth extension CN_E5 of the fifth contact electrode CNE5, so as to surround (or be around) the fifth extension CN_E5 of the fifth contact electrode CNE5.

[0167] The fifth contact electrode CNE5 may have a similar shape to the third contact electrode CNE3 and may be disposed on the fourth electrode RME4 and the sixth electrode RME6. The fifth contact electrode CNE5 may include a fifth extension CN_E5 and a sixth extension CN_E6 extending in the first direction DR1, and a third connecting portion CN_B3 connecting the fifth extension CN_E5 and the sixth extension CN_E6 in the first separation portion ROP1 of the fourth emission region EMA4. The fifth extension CN_E5 may be disposed on the fourth electrode RME4 to contact the second end portion of the fourth electrode RME4 and the fourth light-emitting element ED4, and the sixth extension CN_E6 may be disposed on the sixth electrode RME6 to contact the first end portion of the sixth electrode RME6 and the second light-emitting element ED2. The third connecting portion CN_B3 may extend in the first separation portion ROP1 in the second direction DR2. The first light-emitting element ED1 and the third light-emitting element ED3 may be electrically connected via the third contact electrode CNE3. Electrical signals may be transmitted to the fourth light-emitting element ED4 and the second light-emitting element ED2 via the fourth contact electrode CNE4 and the fifth contact electrode CNE5. The light-emitting element ED located in the fourth sub-pixel PX4 can be connected in series via a second type of contact electrode.

[0168] Because the second type sub-pixel PX#2 includes more electrodes RME than the first type sub-pixel PX#1, the number of series connections between the light-emitting elements ED can be increased. To compensate for the distribution of inkjet printing processes used to arrange the light-emitting elements ED during the manufacture of the display device 10, the display device 10 may include groups of different types of sub-pixels PXn (i.e., the first type sub-pixel PX#1 and the second type sub-pixel PX#2) with different electrode configurations and different numbers of series connections between the light-emitting elements ED.

[0169] Figure 10 and Figure 11 It shows the manufacturing process. Figure 1 A layout diagram of the inkjet printing process performed during the display device.

[0170] refer to Figure 10 and Figure 11 Manufacturing the display device 10 may include printing ink InK, including a light-emitting element ED, onto a display area DPA. The ink printing can be performed using an inkjet printing apparatus IJH. For example, the inkjet printing apparatus IJH can spray ink InK onto the display area DPA while moving in one direction. If the display device 10 extends further in the first direction DR1 than in the second direction DR2, multiple inkjet printing apparatuses IJH can spray ink InK while moving in the first direction DR1.

[0171] Each inkjet printing apparatus IJH may include multiple nozzles (not shown) through which ink InK is ejected, and the amount of ink InK ejected from each nozzle and the number of light-emitting elements ED included in each unit of ink InK can be uniformly controlled (or substantially uniformly controlled). However, depending on the performance of the inkjet printing apparatus IJH, the amount of ink InK ejected between the nozzles of each inkjet printing apparatus IJH may vary; for example, the amount of ink InK ejected from the outermost nozzle of each inkjet printing apparatus IJH may be less than the amount of ink InK ejected from the middle nozzle of each inkjet printing apparatus IJH. Therefore, when the inkjet printing apparatus IJH sprays ink InK while moving in one direction, the number of light-emitting elements ED located in the area where the ink InK is sprayed from the outermost nozzle of each inkjet printing apparatus IJH may be less than the number of light-emitting elements ED in other areas.

[0172] refer to Figure 10 and Figure 11 And also refer to Figure 3 and Figure 4Ink InK can be sprayed from the middle nozzle of each of the inkjet printing apparatuses IJH into a first region AA1 in which a first pixel PXA is arranged, and a uniform number of light-emitting elements ED can be arranged in a first type sub-pixel PX#1 of each of the first pixels PXA. Conversely, ink InK can be sprayed from the outermost nozzle of each of the inkjet printing apparatuses IJH into a second region AA2 in which a second pixel PXB is arranged, and the number of light-emitting elements ED arranged in a second type sub-pixel PX#2 of each of the second pixels PXB can be less than the number of light-emitting elements ED arranged in a first type sub-pixel PX#1 of each of the first pixels PXA.

[0173] Figures 5 to 8 The number of light-emitting elements (EDs) shown in each of the diagrams does not necessarily have to be the same as the actual number of light-emitting elements (EDs) set in each sub-pixel PXn. For example, Figure 5 It shows that a total of ten light-emitting elements (EDs) are set in the emission region EMA of each first type sub-pixel PX#1, and Figure 8 The diagram shows a total of eight light-emitting elements (EDs) in the emission region EMA of each second-type sub-pixel PX#2. However, the number of EDs in each first-type sub-pixel PX#1 and each second-type sub-pixel PX#2 is not particularly limited, but each first-type sub-pixel PX#1 and each second-type sub-pixel PX#2 may include more or less ten EDs and more or less eight EDs, respectively.

[0174] When sub-pixels PXn have the same number of light-emitting elements ED, sub-pixels PXn can be interpreted as having substantially the same number of light-emitting elements ED. Conversely, when sub-pixels PXn have different numbers of light-emitting elements ED, one sub-pixel PXn can be interpreted as having a larger number of light-emitting elements ED than the other sub-pixels PXn. That is, in Figures 5 to 8 The number of light-emitting elements (EDs) in each sub-pixel PXn represents the ratio or relative difference in the number of EDs between different pixels PX or different sub-pixels PXn, but does not necessarily represent the actual number of EDs set in each sub-pixel PXn.

[0175] The size of the emission region EMA of each sub-pixel PXn surrounded by the third embankment BNL3 can be uniform, regardless of the type of each pixel PX or each sub-pixel PXn. Even if each first-type sub-pixel PX#1 and each second-type sub-pixel PX#2 has different electrode configurations, the third embankment BNL3 can have a uniform shape, and therefore, the emission region EMA of each sub-pixel PXn can have a uniform size. A first-type sub-pixel PX#1 with a relatively large number of light-emitting elements ED in its corresponding emission region EMA can be arranged in the first region AA1 of the display area DPA, and a second-type sub-pixel PX#2 with a relatively small number of light-emitting elements ED in its corresponding emission region EMA can be arranged in the second region AA2 of the display area DPA. Within each unit area of ​​each emission region EMA, the number of light-emitting elements ED in the first-type sub-pixel PX#1 can be greater than the number of light-emitting elements ED in the second-type sub-pixel PX#2.

[0176] Here, the term "number of light-emitting elements ED per unit area of ​​each emission region EMA" may refer to the number of light-emitting elements ED disposed in the emission region EMA surrounded by the third embankment BNL3 of each sub-pixel PXn, but this disclosure is not limited thereto. As mentioned above, the light-emitting elements ED may be electrically connected to the electrode RME, and thus may receive electrical signals from the circuit layer CCL disposed below it. Each sub-pixel PXn may have brightness provided by its light-emitting elements ED electrically connected to the electrode RME to properly emit light, and different pixels PX may have different brightness according to the number of light-emitting elements ED electrically connected to the electrode RME.

[0177] That is, the term "number of light-emitting elements (EDs) per unit area of ​​each emission region EMA" can refer to the number of light-emitting elements (EDs) electrically connected to the electrode RME within each emission region EMA. However, if the ratio of the number of light-emitting elements (EDs) electrically connected to the electrode RME to the number of light-emitting elements (EDs) disposed in each emission region EMA is uniform (or substantially uniform) among different pixels PX, then the relative ratio of the number of light-emitting elements (EDs) electrically connected to the electrode RME to the number of light-emitting elements (EDs) disposed in each emission region EMA can be substantially the same among different pixels PX.

[0178] As used herein, the statements "the number of light-emitting elements (EDs) is the same across different pixels PX or across different sub-pixels PXn" or "the size of each emission region EMA is the same across different pixels PX or across different sub-pixels PXn" mean not only that the number of EDs or the size of each emission region EMA is exactly the same across different pixels PX or across different sub-pixels PXn, but also that the number of EDs or the size of each emission region EMA is nearly uniform within an error range (e.g., a set or predetermined error range). Conversely, as used herein, the statements "the number of EDs is not the same (or different) across different pixels PX or across different sub-pixels PXn" or "the size of each emission region EMA is not the same (or different) across different pixels PX or across different sub-pixels PXn" cover situations where the number of EDs or the size of each emission region EMA is significantly different across different pixels PX or across different sub-pixels PXn, exceeding an error range (e.g., a set or predetermined error range). That is, as used in this paper, the statement "the size of each emission region EMA or the number of light-emitting elements ED are not the same or uniform between different pixels PX or between different sub-pixels PXn" means that there may be significant differences in the size of each emission region EMA or the number of light-emitting elements ED between different pixels PX or between different sub-pixels PXn.

[0179] Because groups of different types of sub-pixels PX#1 and PX#2, or groups of different types of pixels PXA and PXB, are arranged according to the distribution of the inkjet printing apparatus IJH, the first region AA1 and the second region AA2 can have shapes corresponding to the distribution of the inkjet printing apparatus IJH. When the display device 10 extends longer in the first direction DR1 than in the second direction DR2, the inkjet printing apparatus IJH can move in the first direction DR1, and the first region AA1 and the second region AA2 can be correspondingly configured to extend in the first direction DR1. The first region AA1 and the second region AA2 can have the same length in the first direction DR1, but can have different widths in the second direction DR2 depending on the shape and size of the inkjet printing apparatus IJH.

[0180] refer to Figure 10 and Figure 11 And also refer to Figure 2Multiple first regions AA1 and multiple second regions AA2 can be formed in the display area DPA of the display device 10, and can be alternately arranged in the second direction DR2. Since each of the first regions AA1 and the second regions AA2 consists of one or more pixel rows, first pixels PXA, each including a first type sub-pixel PX#1, and second pixels PXB, each including a second type sub-pixel PX#2, can not be alternately arranged in the second direction DR2. First pixels PXA can be adjacent to each other in the first region AA1 in the second direction DR2, but can be adjacent to second pixels PXB at the boundary between the first region AA1 and the second region AA2.

[0181] The first region AA1 formed in the display area DPA may have the same size. The first region AA1 may occupy a relatively large portion of the display area DPA, and the first region AA1 is the area in which ink InK (e.g., a set amount or a predetermined amount of ink InK) is sprayed into and then settled. The first region AA1 may be separated from each other by one of the second regions AA2, and may be separated from the non-display area NDA by the other second region AA2 along the second direction DR2.

[0182] Unlike the first region AA1, the second region AA2 may have a different size. When the display device 10 extends longer in the first direction DR1 than in the second direction DR2, the second region AA2 in the outermost portion of the display region DPA may have a smaller size than the second region AA2 in the middle portion of the display region DPA. The second region AA2 in the middle portion of the display region DPA may be located between the first regions AA1. As mentioned above, the distribution of the inkjet printing apparatus IJH is likely to occur in the outermost nozzle of each of the inkjet printing apparatus IJH, and therefore, the second type sub-pixel PX#2 may be arranged at a position corresponding to the outermost nozzle of each of the inkjet printing apparatus IJH.

[0183] Because the inkjet printing units IJH can perform printing simultaneously, ink InK can be printed by different inkjet printing units IJH into the middle portion of the display area DPA, and can be printed by one inkjet printing unit IJH into each of the outermost portions of the display area DPA. Therefore, at least two rows of second-type sub-pixels PX#2 can be arranged in the second region AA2 in the middle portion of the display area DPA to correspond to the outermost nozzles of the two different inkjet printing units IJH. Therefore, the width of the second region AA2 between the first regions AA1 in the second direction DR2 can be greater than the width of the second region AA2 in the outermost portion of the display area DPA in the second direction DR2.

[0184] In some embodiments, the width of the array of two second pixels PXB and a plurality of first pixels PXA disposed between the two second pixels PXB in the second direction DR2 may be the same as the width of each of the inkjet printing apparatus IJH in the second direction DR2. As mentioned above, since the second type sub-pixels PX#2 are arranged at positions corresponding to the outermost nozzles of each of the inkjet printing apparatus IJH, two rows of second pixels PXB spaced apart from each other and a plurality of rows of first pixels PXA disposed between the two rows of second pixels PXB can be formed by ink InK ejected by each of the inkjet printing apparatus IJH, but this disclosure is not limited thereto.

[0185] As mentioned above, the first type sub-pixel PX#1 and the second type sub-pixel PX#2 can have different electrode configurations and can have different numbers of series connections among multiple light-emitting elements ED. Figure 5 The first type of sub-pixel PX#1 may have a two-stage series structure in which the first light-emitting element ED1 and the second light-emitting element ED2 are connected in series, and Figure 8 The second type sub-pixel PX#2 may have a four-stage series structure in which the first light-emitting element ED1, the second light-emitting element ED2, the third light-emitting element ED3, and the fourth light-emitting element ED4 are connected in series. Even if the number of light-emitting elements ED provided per unit area of ​​the emission region EMA of each second type sub-pixel PX#2 is less than the number of light-emitting elements ED provided per unit area of ​​the emission region EMA of each first type sub-pixel PX#1, the number of series connections between light-emitting elements ED in each second type sub-pixel PX#2 may be greater than the number of series connections between light-emitting elements ED in each first type sub-pixel PX#1, and therefore, the brightness per unit area of ​​each second type sub-pixel PX#2 may be higher than the brightness per unit area of ​​each first type sub-pixel PX#1. Even if there are pixels PX with only a small number of light-emitting elements ED due to the distribution of the inkjet printing device IJH, the pixel PX may be designed to have an electrode configuration corresponding to the distribution of ink InK from the inkjet printing device IJH, and thus low brightness due to the distribution of ink InK from the inkjet printing device IJH can be prevented.

[0186] Because the first type sub-pixel PX#1 and the second type sub-pixel PX#2 have different electrode configurations, brightness differences may occur between them. However, by correcting the drive signals of the groups of different types of sub-pixels PX#1 and PX#2, the display device 10 can have uniform brightness at any location in the display area DPA, regardless of whether the number of light-emitting elements ED and the number of series connections between the groups of different types of sub-pixels PX#1 and PX#2 are different.

[0187] Figure 12 It is shown Figure 1 A diagram showing the brightness of the first and second regions of the display device.

[0188] refer to Figure 12 The first region AA1, in which first-type sub-pixels PX#1 are arranged, and the second region AA2, in which second-type sub-pixels PX#2 are arranged, can have different brightnesses depending on the number of light-emitting elements ED and the number of series connections between the light-emitting elements ED. Because the number of series connections between light-emitting elements ED in the second region AA2, which has a relatively small number of light-emitting elements ED per unit area of ​​each emission region EMA, is greater than the number of series connections between light-emitting elements ED in the first region AA1, the second region AA2 can have a higher brightness than the first region AA1 (see “Control X”). If the brightness of the second-type sub-pixels PX#2 in the second region AA2 is corrected based on the brightness of the first-type sub-pixels PX#1 in the first region AA1 during driving the display device 10 (see “Control O”), the display device 10 can have uniform brightness at any location in the display region DPA, regardless of the type of sub-pixels PXn at the corresponding location in the display region DPA.

[0189] For example, because a sub-pixel PXn with a relatively small number of light-emitting elements ED is designed to have a different electrode configuration from other sub-pixels PXn according to the distribution of the inkjet printing apparatus IJH, the sub-pixel PXn with a relatively small number of light-emitting elements ED can have a higher brightness than other sub-pixels PXn. Even if the brightness of a sub-pixel PXn is corrected based on a sub-pixel PXn with relatively low brightness, the sub-pixel PXn can still have a brightness similar to the designed brightness, and therefore, the display device 10 can still have high brightness regardless of how the brightness of the sub-pixel PXn is corrected.

[0190] Figure 13 This is a perspective cross-sectional view of a light-emitting element according to an embodiment of the present disclosure.

[0191] refer to Figure 13 The light-emitting element ED can be a light-emitting diode (LED), for example, an ILED having a size of a few nanometers or a few micrometers and formed of inorganic materials. If an electric field is formed in a specific direction between two opposing electrodes (e.g., electrodes RME described above), the light-emitting element ED can be aligned between the two polarized electrodes.

[0192] The light-emitting element (ED) may have a shape that extends in one direction. The light-emitting element (ED) may have the shape of a cylinder, rod, wire, or tube, but the shape of the light-emitting element (ED) is not particularly limited. Alternatively, the light-emitting element (ED) may have the shape of a polygonal prism (such as a regular cube, a rectangular parallelepiped, or a hexagonal prism), or may have a shape that extends in one direction but has a partially inclined outer surface.

[0193] The light-emitting element (ED) may include a semiconductor layer doped with impurities of any conductivity type (e.g., p-type or n-type). The semiconductor layer may receive electrical signals from an external power source to emit light within a specific wavelength range. The light-emitting element (ED) may include a first semiconductor layer 31, a second semiconductor layer 32, a light-emitting layer 36, an electrode layer 37, and an insulating film 38.

[0194] The first semiconductor layer 31 may include an n-type semiconductor. The first semiconductor layer 31 may include semiconductor material Al. x Ga y In 1-x-y N (where 0 ≤ x ≤ 1, 0 ≤ y ≤ 1, and 0 ≤ x + y ≤ 1). For example, semiconductor material Al. x Ga y In 1-x-y N can be at least one of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN doped with an n-type dopant. The first semiconductor layer 31 can be doped with an n-type dopant, and the n-type dopant can be Si, Ge, or Sn. However, this disclosure is not limited thereto. The first end portion of the light-emitting element ED can be the portion of the first semiconductor layer 31 of the light-emitting element ED disposed relative to the light-emitting layer 36.

[0195] The second semiconductor layer 32 may be disposed on the light-emitting layer 36. The second semiconductor layer 32 may include a p-type semiconductor. The second semiconductor layer 32 may include semiconductor material Al. x Ga y In 1-x-y N (where 0 ≤ x ≤ 1, 0 ≤ y ≤ 1, and 0 ≤ x + y ≤ 1). For example, semiconductor material Al. x Ga y In 1-x-y N can be at least one of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN doped with a p-type dopant. The second semiconductor layer 32 can be doped with a p-type dopant, and the p-type dopant can be Mg, Zn, Ca, Se, or Ba. However, this disclosure is not limited thereto. The second end portion of the light-emitting element ED can be the portion of the second semiconductor layer 32 of the light-emitting element ED disposed relative to the light-emitting layer 36.

[0196] Figure 13The first semiconductor layer 31 and the second semiconductor layer 32 are shown to be formed as a single layer, but this disclosure is not limited thereto. Alternatively, depending on the material of the light-emitting layer 36, each of the first semiconductor layer 31 and the second semiconductor layer 32 may include more than one layer, such as, for example, a cladding layer or a tensile strain barrier reduction (TSBR) layer.

[0197] A light-emitting layer 36 may be disposed between a first semiconductor layer 31 and a second semiconductor layer 32. The light-emitting layer 36 may comprise a single quantum well structure material or a multi-quantum well structure material. When the light-emitting layer 36 comprises a material with a multi-quantum well structure, the light-emitting layer 36 may have a structure in which multiple quantum layers and multiple well layers are alternately stacked. The light-emitting layer 36 can emit light by recombinating electron-hole pairs according to an electrical signal applied to it via the first semiconductor layer 31 and the second semiconductor layer 32. The light-emitting layer 36 may comprise a material such as AlGaN or AlGaInN. For example, when the light-emitting layer 36 has a multi-quantum well structure in which multiple quantum layers and multiple well layers are alternately stacked, the quantum layers may comprise a material such as AlGaN or AlGaInN, and the well layers may comprise a material such as GaN or AlInN.

[0198] However, this disclosure is not limited thereto. Alternatively, depending on the wavelength of the light to be emitted, the light-emitting layer 36 may have a structure in which semiconductor materials with large bandgap energies and semiconductor materials with small bandgap energies are stacked alternately, or may include group III or group V semiconductor materials. The type of light emitted by the light-emitting layer 36 is not particularly limited. The light-emitting layer 36 may emit light in the red or green wavelength range, instead of blue light, as needed.

[0199] Electrode layer 37 may be an ohmic contact electrode, but this disclosure is not limited thereto. Alternatively, electrode layer 37 may be a Schottky contact electrode. A light-emitting element ED may include at least one electrode layer 37. A light-emitting element ED may include more than one electrode layer 37, but this disclosure is not limited thereto. Alternatively, electrode layer 37 may not be provided.

[0200] When the light-emitting element ED is electrically connected to an electrode (or contact electrode (e.g., the contact electrode CNE described above)), the electrode layer 37 can reduce the resistance between the light-emitting element ED and the electrode (or contact electrode). The electrode layer 37 may include a conductive metal. For example, the electrode layer 37 may include at least one of Al, Ti, In, gold (Au), Ag, ITO, IZO, and ITZO. However, this disclosure is not limited thereto.

[0201] The insulating film 38 may be configured to surround the first semiconductor layer 31, the second semiconductor layer 32, and the electrode layer 37 along the outer peripheral surfaces of the electrode layer 37. For example, the insulating film 38 may be configured to at least surround the light-emitting layer 36, but expose two end portions of the light-emitting element ED in the longitudinal direction. In the region adjacent to at least one end portion of the light-emitting element ED, the insulating film 38 may be formed as a circle in cross-sectional view.

[0202] The insulating film 38 may include a material having insulating properties, such as, for example, silicon oxide (SiO2). x ), silicon nitride (SiN) x ), silicon nitride oxide (SiO) x N y ), aluminum nitride (AlN) x ) or aluminum oxide (AlO) x The insulating film 38 is shown as a single-layer film, but this disclosure is not limited thereto. Alternatively, in some embodiments, the insulating film 38 may be formed as a multilayer film in which multiple layers are stacked.

[0203] The insulating film 38 protects other components of the light-emitting element (ED). The insulating film 38 prevents any short circuits that may occur in the ED when it is in direct contact with an electrode to which an electrical signal is applied. Furthermore, the insulating film 38 prevents (or reduces) a decrease in the emission efficiency of the ED.

[0204] The outer surface of the insulating film 38 may undergo surface treatment. The light-emitting element ED can be sprayed onto the electrode while being dispersed in ink (e.g., a pre-defined or predetermined ink, referring to the ink InK described above). Here, the surface of the insulating film 38 may be hydrophobically or hydrophilically treated to keep the light-emitting element ED dispersed in the ink and prevent it from agglomerating with other adjacent light-emitting elements ED.

[0205] When the display device 10 extends longer in the first direction DR1 than in the second direction DR2, the inkjet printing apparatus IJH can spray ink InK while moving in the first direction DR1. Therefore, sub-pixels PXn of the same type (i.e., first-type sub-pixels PX#1 or second-type sub-pixels PX#2) can be arranged in the first direction DR1, and the electrode RME can extend in the same direction as the direction in which the sub-pixels PXn of the same type are arranged. That is, the electrode RME of the display device 10 can also have a shape and structure corresponding to the printing process performed by the inkjet printing apparatus IJH.

[0206] Figure 14 It shows along Figure 2 A layout diagram of the arrangement of sub-pixels in the first and second regions of a display device. Figure 14This diagram shows some sub-pixels PXn in the first region AA1 and the second region AA2, located in the outermost portion of the display area DPA on one side of the display device 10 in the first direction DR1. To clearly illustrate the relative arrangement of the electrodes RME, Figure 14 The first dike section BNL1 and the second dike section BNL2 are not shown.

[0207] refer to Figure 14 The direction in which the electrode RME of each sub-pixel PXn extends can be the same as the direction in which sub-pixels of the same type PXn (i.e., first-type sub-pixel PX#1 or second-type sub-pixel PX#2) are arranged. As mentioned above, the electrode RME of each sub-pixel PXn can be obtained by forming a single electrode line extending in one direction and dividing each of the electrode lines in the sub-region SA of each sub-pixel PXn after arranging the light-emitting element ED. The electrode line can extend from one side of the non-display area NDA to the other side and can be divided into the electrode RME of each sub-pixel PXn in the sub-region SA of each sub-pixel PXn.

[0208] The display device 10 may include groups of sub-pixels PXn of different types with different electrode configurations according to the distribution of the inkjet printing apparatus IJH. Because groups of sub-pixels PXn of different types (i.e., first type sub-pixels PX#1 and second type sub-pixels PX#2) have different electrode configurations, the arrangement of first type sub-pixels PX#1 and second type sub-pixels PX#2 can be considered to form electrode lines. Because sub-pixels PXn of the same type (i.e., first type sub-pixels PX#1 or second type sub-pixels PX#2) can be arranged along the moving direction of the inkjet printing apparatus IJH, the electrode lines for aligning the light-emitting element ED can extend along the moving direction of the inkjet printing apparatus IJH. Therefore, the direction in which the electrodes RME of each sub-pixel PXn are arranged can be the same as the direction in which the first type sub-pixels PX#1 or second type sub-pixels PX#2 are arranged and the moving direction of the inkjet printing apparatus IJH.

[0209] like Figure 14As shown, the electrode RME of each of the first type sub-pixels PX#1 of the first pixel PXA in the first region AA1 and the electrode RME of each of the second type sub-pixels PX#2 of the second pixel PXB in the second region AA2 can extend along the first direction DR1. The electrode RME of each of the first type sub-pixels PX#1 arranged along the first direction DR1 can be obtained by forming electrode lines and then dividing the electrode lines in the sub-region SA of each of the first type sub-pixels PX#1. Similarly, the electrode RME of each of the second type sub-pixels PX#2 arranged along the first direction DR1 can be obtained by forming electrode lines and then dividing the electrode lines in the sub-region SA of each of the second type sub-pixels PX#2. When the display device 10 extends longer in the first direction DR1 than in the second direction DR2, multiple electrode RMEs can be configured to extend in the first direction DR1 because the inkjet printing device IJH moves in the first direction DR1.

[0210] Other embodiments of the display device according to this disclosure will be described below.

[0211] Figure 15 This is a layout diagram showing the arrangement of a plurality of pixels in the display area of ​​a display device according to another embodiment of the present disclosure. Figure 16 It is shown in Figure 15 A layout diagram of the sub-pixels arranged at the boundary between the first and second regions of a display device. Figure 16 It shows in Figure 15 Some sub-pixels PXn in the first region AA1 and the second region AA2 in the outermost part of the display area DPA on one side of the second direction DR2 of the display device 10_1.

[0212] refer to Figure 15 and Figure 16 The first region AA1 and the second region AA2 of the display device 10_1 can extend along the second direction DR2. A first pixel PXA including a first type sub-pixel PX#1 and a second pixel PXB including a second type sub-pixel PX#2 can be arranged in the same column along the second direction DR2, and the first region AA1 and the second region AA2 can be arranged along the first direction DR1. As mentioned above, during the manufacture of the display device 10_1, the positions of the first region AA1 and the second region AA2, as well as the arrangement of the electrodes RME of each sub-pixel PXn, can vary according to the movement direction of the inkjet printing apparatus IJH. Figure 15 and Figure 16 Implementation methods and Figure 2 and Figure 14 The difference in the implementation method lies in the arrangement pattern of the first type sub-pixel PX#1 and the second type sub-pixel PX#2. The following will mainly focus on the... Figure 2 and Figure 14 To describe the differences in the implementation methods Figure 15 and Figure 16 The implementation method.

[0213] When the display device 10_1 extends longer in the first direction DR1 than in the second direction DR2, the inkjet printing device IJH can spray ink (e.g., the ink InK described above) while moving in the second direction DR2. Subpixels PXn of the same type (i.e., first type subpixel PX#1 or second type subpixel PX#2) can be arranged along the second direction DR2 according to the distribution of the inkjet printing device IJH, and the first type subpixel PX#1 and the second type subpixel PX#2 can be arranged to be adjacent to each other in the first direction DR1.

[0214] like Figure 16 As shown, the electrode RME of each of the first type sub-pixels PX#1 of the first pixel PXA in the first region AA1 and the electrode RME of each of the second type sub-pixels PX#2 of the second pixel PXB in the second region AA2 can extend along the second direction DR2. The electrode RME of each of the first type sub-pixels PX#1 arranged along the second direction DR2 can be obtained by forming electrode lines and then dividing the electrode lines in the sub-region SA of each of the first type sub-pixels PX#1. Similarly, the electrode RME of each of the second type sub-pixels PX#2 arranged along the second direction DR2 can be obtained by forming electrode lines and then dividing the electrode lines in the sub-region SA of each of the second type sub-pixels PX#2. When the display device 10 extends longer in the first direction DR1 than in the second direction DR2, because the inkjet printing device IJH moves in the second direction DR2, multiple electrode RMEs can be configured to extend in the second direction DR2, and the first region AA1 and the second region AA2 can extend in the second direction DR2.

[0215] Figure 17 This is a layout diagram showing the arrangement of a plurality of pixels in the display area of ​​a display device according to another embodiment of the present disclosure. Figure 18 yes Figure 17 A plan view of the sub-pixels (i.e., third-type sub-pixels) of the third pixel of the display device. To clearly show the relative arrangement of the electrodes RME, Figure 18 The first dike section BNL1 and the second dike section BNL2 are not shown.

[0216] refer to Figure 17 and Figure 18The display device 10_2 may further include a third region AA3 disposed between the first region AA1 and the second region AA2, and a sub-pixel PXn having a different electrode configuration than the sub-pixel PXn disposed in the first region AA1 or the second region AA2 is disposed in the third region AA3. The sub-pixel PXn disposed in the third region AA3 may include a third type sub-pixel PX#3, which has a different electrode configuration and a different number of series connections between the light-emitting elements ED compared to the first type sub-pixel PX#1 disposed in the first region AA1 and the second type sub-pixel PX#2 disposed in the second region AA2. Figure 17 and Figure 18 Implementation methods and Figure 2 The difference in the implementation method lies in that: by setting a third region AA3 between the first region AA1 and the second region AA2, brightness differences caused by the distribution of the printing process can be accurately corrected. The following will mainly focus on... Figure 2 The differences in the implementation methods (e.g., the structure of the third region AA3 and the third type sub-pixel PX#3) will be described. Figure 17 and Figure 18 The implementation method.

[0217] The third region AA3 can be set between the first region AA1 and the second region AA2 and extend in the first direction DR1. Figure 2 The pixel row adjacent to the second region AA2 in the first region AA1 can be formed as the third region AA3. Therefore, the second region AA2, the third region AA3, and the first region AA1 can be arranged in the display area DPA along the second direction DR2. The first region AA1 can be located between the third regions AA3 that are spaced apart from each other in the second direction DR2, and the second region AA2 can also be located between the third regions AA3 that are spaced apart from each other in the second direction DR2. That is, the third region AA3 can be located between the first region AA1 and the second region AA2.

[0218] Ink ejected from the intermediate nozzle of each inkjet printing unit IJH (rather than from the outermost nozzle of each inkjet printing unit IJH) can be sprayed into the third region AA3, while ink ejected from the outermost nozzle of each inkjet printing unit IJH is sprayed into the second region AA2. Even if multiple inkjet printing units IJH perform printing simultaneously, the intermediate nozzle of one inkjet printing unit IJH may not be adjacent to the intermediate nozzle of another inkjet printing unit IJH. Therefore, the third region AA3 may have a smaller width in the second direction DR2 than the second region AA2 in the middle of the display area DPA.

[0219] The third type sub-pixel PX#3, located in the third region AA3, can be configured to reduce the brightness difference between the first type sub-pixel PX#1 in the first region AA1 and the second type sub-pixel PX#2 in the second region AA2. The third type sub-pixel PX#3 can have a cascaded structure, which has more levels than the first type sub-pixel PX#1 with a two-level cascaded structure, but fewer levels than the second type sub-pixel PX#2 with a four-level cascaded structure.

[0220] For example, a third type sub-pixel PX#3 may include more electrode RMEs than a first type sub-pixel PX#1, but fewer electrode RMEs than a second type sub-pixel PX#2. The third type sub-pixel PX#3 may include a first electrode group RME#1 and a second electrode group RME#2, and may also include a third electrode group RME#3 disposed between the first electrode group RME#1 and the second electrode group RME#2.

[0221] The third electrode group RME#3 may include a ninth electrode RME9 disposed between the first electrode RME1 and the third electrode RME3 and spaced apart from the first electrode RME1 and the third electrode RME3 in the first direction DR1, and a tenth electrode RME10 disposed between the second electrode RME2 and the fourth electrode RME4 and spaced apart from the ninth electrode RME9 in the second direction DR2. The light-emitting element ED may include a first light-emitting element ED1 disposed on the first electrode group RME#1, a second light-emitting element ED2 disposed on the second electrode group RME#2, and a third light-emitting element ED3 disposed on the third electrode group RME#3. Within each unit area of ​​their emission region EMA, the third type sub-pixel PX#3 may include fewer light-emitting elements ED than the first type sub-pixel PX#1, but more light-emitting elements ED than the second type sub-pixel PX#2.

[0222] The contact electrode CNE may include a first contact electrode CNE1 and a second contact electrode CNE2 as first-type contact electrodes, and may also include a third contact electrode CNE3 as a second-type contact electrode disposed on the second electrode RME2 and the ninth electrode RME9, and a fourth contact electrode CNE4 as a second-type contact electrode disposed on the third electrode RME3 and the tenth electrode RME10. The first light-emitting element ED1, the second light-emitting element ED2, and the third light-emitting element ED3 may be connected in series via the third contact electrode CNE3 and the fourth contact electrode CNE4. The third-type sub-pixel PX#3 may include more electrodes RME than the first-type sub-pixel PX#1, and may have a three-level series structure. Because the display device 10_2 also includes a third region AA3 in which the third-type sub-pixel PX#3 is arranged, the brightness difference between the first region AA1 and the second region AA2 can appear in stages, and the brightness of the display area DPA can be uniformly controlled by correcting the brightness of the first region AA1, the second region AA2, and the third region AA3.

[0223] Figure 19 It is a plan view of the sub-pixels (i.e., first type sub-pixels) of the first pixel of a display device according to another embodiment of the present disclosure. Figure 20 It is shown in Figure 19 A layout diagram of the sub-pixels arranged at the boundary between the first and second regions of the display device. To clearly show the relative arrangement of the electrodes RME, Figure 19 The first dike section BNL1 and the second dike section BNL2 are not shown.

[0224] refer to Figure 19 and Figure 20 The first type sub-pixel PX#1 of the display device 10_3 is comparable Figure 5 The first type of sub-pixel PX#1 includes fewer electrodes RME. Each of the first type of sub-pixel PX#1 may include a first electrode RME1 and a second electrode RME2, but does not include a third electrode RME3 and a fourth electrode RME4. Each of the first type of sub-pixel PX#1 may include a first contact electrode CNE1 and a second contact electrode CNE2 respectively disposed on the first electrode RME1 and the second electrode RME2, and the plurality of light-emitting elements ED of each of the first type of sub-pixel PX#1 may have a first-order series structure.

[0225] The second type sub-pixel PX#2 of the display device 10_3 may have the same... Figure 5The sub-pixels PX#1 and PX#2 have the same structure. The display device 10_3 may include a first region AA1 in which a first type of sub-pixel PX#1 with a first-level series structure is arranged, and a second region AA2 in which a second type of sub-pixel PX#2 with a two-level series structure is arranged. Within each unit area of ​​their emission regions EMA, the first type of sub-pixel PX#1 may include fewer electrodes RME than the second type of sub-pixel PX#2, but may include more light-emitting elements ED than the second type of sub-pixel PX#2. Figure 19 and Figure 20 Implementation methods and Figure 5 and Figure 8 The difference in the implementation method is that the first type sub-pixel PX#1 and the second type sub-pixel PX#2 respectively include a single-level serial structure and a two-level serial structure.

[0226] Figure 21 It is a plan view of the sub-pixels (i.e., second type sub-pixels) of the second pixel of a display device according to another embodiment of the present disclosure. Figure 22 It is shown in Figure 21 A layout diagram of the sub-pixels arranged at the boundary between the first and second regions of the display device. To clearly show the relative arrangement of the electrodes RME, Figure 21 The first dike section BNL1 and the second dike section BNL2 are not shown.

[0227] refer to Figure 21 and Figure 22 The second type sub-pixel PX#2 of the display device 10_4 is comparable Figure 8 The second type of sub-pixel PX#2 includes more electrode RMEs. Each of the second type of sub-pixel PX#2 may include a first electrode group RME#1 and a second electrode group RME#2, and the first electrode group RME#1 and the second electrode group RME#2 may each include multiple upper electrodes RME_A and multiple lower electrodes RME_B. The first electrode group RME#1 may include a first electrode RME1, a second electrode RME2, and four upper electrodes RME_A disposed between the first electrode RME1 and the second electrode RME2, and the second electrode group RME#2 may include a third electrode RME3, a fourth electrode RME4, and four lower electrodes RME_B disposed between the third electrode RME3 and the fourth electrode RME4. Therefore, a total of 12 electrode RMEs can be provided in the emission region EMA of each of the second type of sub-pixel PX#2.

[0228] The contact electrode CNE may include a first contact electrode CNE1 and a second contact electrode CNE2 respectively disposed on the first electrode RME1 and the fourth electrode RME4, as well as multiple contact electrodes CNE_A disposed on the first electrode group RME#1 and the second electrode group RME#2, and multiple contact electrodes CNE_B disposed on the first electrode group RME#1 and the second electrode group RME#2. Each of the second type sub-pixels PX#2 may include a relatively large number of electrodes RME and contact electrodes CNE, and the multiple light-emitting elements ED of each of the second type sub-pixels PX#2 may have a six-level series structure.

[0229] The first type sub-pixel PX#1 of the display device 10_4 may have the same... Figure 8 The sub-pixels PX#1 and PX#2 have the same structure. The display device 10_4 may include a first region AA1 in which a first type of sub-pixel PX#1 with a four-level series structure is arranged, and a second region AA2 in which a second type of sub-pixel PX#2 with a six-level series structure is arranged. Within each unit area of ​​their emission regions EMA, the second type of sub-pixel PX#2 may include more electrodes RME than the first type of sub-pixel PX#1, but may include fewer light-emitting elements ED than the first type of sub-pixel PX#1. Figure 21 and Figure 22 Implementation methods and Figure 5 and Figure 8 The difference in the implementation method is that the first type sub-pixel PX#1 and the second type sub-pixel PX#2 have a four-level serial structure and a six-level serial structure, respectively.

[0230] Figure 23 This is a plan view of the sub-pixels (specifically, second type sub-pixels) of a display device according to another embodiment of this disclosure. To clearly show the relative arrangement of the electrodes RME, Figure 23 The first dike section BNL1 and the second dike section BNL2 are not shown.

[0231] refer to Figure 23 Each comparable sub-pixel PX#2 of the second type in the display device 10_5 Figure 21 The second type of sub-pixel PX#2 includes more electrodes RME.

[0232] Each of the second-type sub-pixels PX#2 may include a first electrode group RME#1 and a second electrode group RME#2. The first electrode group RME#1 may include a first electrode RME1, a second electrode RME2, five upper electrodes RME_A disposed between the first electrode RME1 and the second electrode RME2, and one upper electrode RME_A spaced apart from the second electrode RME2. The second electrode group RME#2 may include a third electrode RME3 and a fourth electrode RME4, five lower electrodes RME_B disposed between the third electrode RME3 and the fourth electrode RME4, and one lower electrode RME_B spaced apart from the fourth electrode RME4. Therefore, a total of 16 electrodes RME can be provided in the emission region EMA of each of the second-type sub-pixels PX#2.

[0233] The contact electrode CNE may include a first contact electrode CNE1 and a second contact electrode CNE2 respectively disposed on the first electrode RME1 and the second electrode RME2, and a plurality of contact electrodes CNE_A disposed on the first electrode group RME#1 and the second electrode group RME#2, and a plurality of contact electrodes CNE_B disposed on the first electrode group RME#1 and the second electrode group RME#2. The second type sub-pixel PX#2 may include a relatively large number of electrodes RME and contact electrodes CNE, and the plurality of light-emitting elements ED in each of the second type sub-pixels PX#2 may have an eight-level series structure.

[0234] The first type sub-pixel PX#1 of the display device 10_5 may have the same... Figure 21 The sub-pixels PX#1 and PX#2 have the same structure. The display device 10_5 may include a first region AA1 in which a first type of sub-pixel PX#1 with a six-level series structure is arranged, and a second region AA2 in which a second type of sub-pixel PX#2 with an eight-level series structure is arranged. Within each unit area of ​​their emission regions EMA, the second type of sub-pixel PX#2 may include more electrodes RME than the first type of sub-pixel PX#1, but fewer light-emitting elements ED than the first type of sub-pixel PX#1. Figure 23 Implementation methods and Figure 21 The difference in the implementation method is that the first type sub-pixel PX#1 and the second type sub-pixel PX#2 have a six-level series structure and an eight-level series structure, respectively.

[0235] In some implementations, each pixel PX may include three sub-pixels PXn, and in the implementations described above, three sub-pixels of the same type (i.e., three first-type sub-pixels PX#1 or three second-type sub-pixels PX#2) may form a single pixel (i.e., a first pixel PXA or a second pixel PXB). However, this disclosure is not limited to the above implementations. Alternatively, each pixel PX may be composed of sub-pixels PXn of different types.

[0236] Figure 24 This is a layout diagram showing the arrangement of a plurality of pixels in the display area of ​​a display device according to another embodiment of the present disclosure. Figure 25 It is shown in Figure 24 A layout diagram of the sub-pixels arranged at the boundary between the first and second regions of a display device.

[0237] refer to Figure 24 and Figure 25 The display area DPA of the display device 10_6 can be classified into a first area AA1 and a second area AA2 defined according to whether a first type sub-pixel PX#1 or a second type sub-pixel PX#2 is arranged therein, and each pixel PX may include sub-pixels PXn of different types. The first area AA1 and the second area AA2 can be distinguished from each other by the type of sub-pixels PXn disposed therein. Figure 2 The corresponding parts are different, and each pixel PX can include different types of sub-pixels PXn.

[0238] Refer again Figure 2 Three first-type sub-pixels PX#1 can form a single first pixel PXA, and only the first pixel PXA can be arranged in the first region AA1. Furthermore, refer again... Figure 2 Three second-type sub-pixels PX#2 can form a single second pixel PXB, and only the second pixel PXB can be arranged in the second region AA2. Conversely, refer to Figure 24 and Figure 25 Two first-type sub-pixels PX#1 and one second-type sub-pixel PX#2 can form a single pixel PX, and such a pixel PX can be arranged in both the first region AA1 and the second region AA2. The electrode configuration of each of the sub-pixels PXn in the display device 10_6 can be designed taking into account the distribution of the printing process during the manufacture of the display device 10_6. The structure of the electrode RME can vary relative to each sub-pixel PXn (rather than relative to the distribution of each pixel PX) according to the distribution of the printing process. Therefore, the display device 10_6 can include a plurality of pixels PX, each having a different type of sub-pixel PXn. In this case, brightness correction can be performed not only on the pixel PX but also on the sub-pixels PXn of each of the pixels PX, which can be controlled based on the number of series connections between the light-emitting elements ED in each of the sub-pixels PXn of each of the pixels PX.

[0239] In concluding this detailed description, those skilled in the art will understand that many variations and modifications can be made to the disclosed embodiments without substantially departing from the principles of this disclosure. Therefore, the disclosed embodiments are used in a general and descriptive sense only and not for limiting purposes. The scope of this disclosure is defined by the appended claims and their equivalents.

Claims

1. A display device comprising: a plurality of sub-pixels arranged along a first direction and a second direction intersecting the first direction; wherein each of the plurality of sub-pixels includes an emission region, a plurality of electrodes extending in the first direction and spaced apart from each other in the second direction located in the emission region, and a plurality of light emitting elements located on the plurality of electrodes spaced apart from each other in the second direction, and wherein the plurality of sub-pixels includes a plurality of first type sub-pixels and a plurality of second type sub-pixels, the second type sub-pixels having a different number of the electrodes in the emission region from the first type sub-pixels, wherein, per unit area of the emission region, the first type sub-pixels include more of the light emitting elements than the second type sub-pixels, and in the emission region, the first type sub-pixels include less of the electrodes than the second type sub-pixels. 2.The display device according to claim 1, further comprising: a plurality of first regions in which the first type sub-pixels are arranged along the first direction and the second direction; and a plurality of second regions adjacent to the first regions in which the second type sub-pixels are arranged along the first direction and the second direction, wherein the first regions and the second regions have the same length in the first direction. 3.The display device according to claim 2, wherein the plurality of first regions and the plurality of second regions are alternately arranged along the second direction, and a distance between the plurality of second regions in the second direction is uniform.

4. The display device according to claim 3, wherein at least some of the plurality of second regions have a smaller width in the second direction than other of the plurality of second regions. 5.The display device according to claim 2, wherein each of the plurality of sub-pixels further includes a sub-region spaced apart from the emission region in the first direction, and the plurality of electrodes of each of the plurality of sub-pixels arranged along the first direction are separately located in the sub-region of the respective sub-pixel of the plurality of sub-pixels. 6.The display device according to claim 1, further comprising: a plurality of first pixels each including two or more of the plurality of first type sub-pixels; and a plurality of second pixels each including two or more of the plurality of second type sub-pixels, wherein the first pixels are arranged along the first direction, and the second pixels are arranged along the first direction. 7.The display device according to claim 1, wherein each of the plurality of sub-pixels includes a first electrode, a second electrode spaced apart from the first electrode in the second direction, and a first light emitting element located on the first electrode and the second electrode, and ​ Each of the plurality of second-type subpixels further includes a third electrode separated from the first electrode in the first direction, a fourth electrode separated from the second electrode in the first direction, and a second light emitting element on the third electrode and the fourth electrode.

8. The display device according to claim 7, wherein Each of the plurality of first-type subpixels further includes a first contact electrode on the first electrode and a second contact electrode on the second electrode, the first contact electrode is in contact with a first end portion of the first light emitting element, and the second contact electrode is in contact with a second end portion of the first light emitting element.

9. The display device according to claim 7, wherein Each of the plurality of second-type subpixels further includes a first contact electrode on the first electrode, a second contact electrode on the fourth electrode, and a third contact electrode on the third electrode, and the first contact electrode is in contact with a first end portion of the first light emitting element, the third contact electrode is in contact with a second end portion of the first light emitting element and a first end portion of the second light emitting element, and the second contact electrode is in contact with a second end portion of the second light emitting element.

10. The display device according to claim 1, wherein Each of the plurality of subpixels includes a first electrode, a second electrode separated from the first electrode in the second direction, a third electrode separated from the first electrode in the first direction, and a fourth electrode separated from the second electrode in the first direction, and Each of the plurality of second-type subpixels further includes a fifth electrode between the first electrode and the second electrode, a sixth electrode separated from the second electrode in the second direction, a seventh electrode separated from the fifth electrode in the first direction, and an eighth electrode separated from the sixth electrode in the first direction.

11. The display device of claim 10, wherein, Each of the plurality of first-type subpixels further includes a first light emitting element on the first electrode and the second electrode, a second light emitting element on the third electrode and the fourth electrode, and a first contact electrode and a second contact electrode on the first electrode and the second electrode, respectively.

12. The display device of claim 10, wherein, Each of the plurality of second-type subpixels further includes a first light emitting element on the first electrode and the fifth electrode, a second light emitting element on the second electrode and the sixth electrode, a third light emitting element on the third electrode and the seventh electrode, a fourth light emitting element on the fourth electrode and the eighth electrode, a first contact electrode on the first electrode and a second contact electrode on the second electrode, a third contact electrode on the third electrode and the fifth electrode, a fourth contact electrode on the seventh electrode and the eighth electrode, and a fifth contact electrode on the fourth electrode and the sixth electrode.

13. The display device according to claim 10, wherein the plurality of subpixels further include a plurality of third-type subpixels, and Each of the plurality of third type sub-pixels includes a ninth electrode between the first electrode and the third electrode and a tenth electrode spaced apart from the ninth electrode in the second direction and between the second electrode and the fourth electrode.

14. A display device comprising: a display region in which a plurality of pixels including a plurality of sub-pixels are located; and a non-display region surrounding the display region, wherein each of the plurality of sub-pixels includes: a first electrode group including a plurality of electrodes extending in a first direction and spaced apart from each other in a second direction intersecting the first direction, a second electrode group spaced apart from the first electrode group in the first direction and including a plurality of electrodes spaced apart from each other in the second direction, and a plurality of light emitting elements located on the electrodes and spaced apart from each other in the first direction, wherein the plurality of pixels includes a plurality of first pixels and a plurality of second pixels, a number of the electrodes located in each of the plurality of sub-pixels of the plurality of second pixels is different from a number of the electrodes located in each of the plurality of sub-pixels of the plurality of first pixels, and wherein the display region includes a plurality of first regions in which the first pixels are located and a plurality of second regions in which the second pixels are located, wherein each of the plurality of sub-pixels further includes an emission region in which the light emitting elements and the electrodes are located, in each unit area of the emission region, the first pixels have more of the light emitting elements than the second pixels, and in the emission region, the first pixels have less of the electrodes than the second pixels.

15. The display device according to claim 14, wherein the first regions and the second regions extend in the first direction and are alternately arranged in the second direction, and the first regions and the second regions have the same length in the first direction.

16. The display device according to claim 15, wherein the first regions are located between the second regions spaced apart from each other in the second direction, and a distance between the second regions in the second direction is uniform.

17. The display device of claim 16, wherein, a width in the second direction of a first second region in an outermost portion among the second regions of the display region is smaller than a width in the second direction of a second second region in an intermediate portion among the second regions of the display region.

18. The display device of claim 16, wherein, the display region further includes a third region between the first regions and the second regions, and a third pixel having a different number of the electrodes from the first pixels and the second pixels in each of the plurality of sub-pixels is located in the third region.

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